Error Checking Patents (Class 235/437)
  • Patent number: 5247505
    Abstract: The information recording method of the present invention comprises steps of recording information on a recording medium by a recording head during forward movement, reading the information recorded during the forward movement in the opposite sequence to the recording sequence during backward movement, and checking if the information has been correctly written or not based on the information read during the backward movement.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: September 21, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Shikichi, Fumiaki Kawaguchi, Kenichi Suzuki, Masayuki Usui, Hiroshi Matsuoka, Kazuhiko Matsuoka, Hideki Hosoya, Akio Aoki, Masahiko Enari, Kazuo Minoura
  • Patent number: 5243602
    Abstract: A method and apparatus for testing bar code reader devices. A computer is programmed to receive data indicative of output signals of input devices for reading symbologies and to produce signals representative of those corresponding to the output of an input device. The computer then sends these representative signals to a subject bar code reader and receives the resulting signals produced by the reader. The computer also compares the received resulting signals with the representative signals to determine any differences. If the differences are judged to be significant, the computer produces an indicative signal.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: September 7, 1993
    Assignee: Intermec Corporation
    Inventor: Joseph G. Akagi, Jr.
  • Patent number: 5218190
    Abstract: A portable, conveniently usable, and inexpensive non-contact bar code verifier permits testing of bar code labels at some arbitrary but constant distance from the verifier. Means are provided for analog analysis of bar code label contrast levels, and for derivation of new, instructive indices characterizing the readability and print quality. Additionally, a new method for determination of absolute bar code label dimensions is disclosed. The method of calibration for arbitrary scanning distance and angle standardizes not only the verifier's ability to measure absolute dimensions at unknown distances, but also its ability to discern contrast under arbitrary lighting conditions and scanning equipment. This is accomplished by employing calibration standards of known characteristics. Bar code verification information may be stored and/or employed for a variety of control and analytical functions as recognized in the art.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: June 8, 1993
    Assignee: Symbol Technologies, Inc.
    Inventors: John Hardesty, Edward Barkan, Christina S. Barkan, Dean Fletcher, Timothy Almeida
  • Patent number: 5216229
    Abstract: An object verification system generates an incremental verification key which can be carried on the object co-extensive with the region of the associated randomly varying characteristic. The incremental key can be formed by measuring values of the characteristic and comparing selected pairs of values. The algebraic sign of the comparison can be used as an indicium for creating a verification key distributable across the region of the object. Alternately, the magnitude of the difference between the selected pairs of values can be also be included in some or all of the indicia.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: June 1, 1993
    Assignee: Rand McNally & Company
    Inventors: Robert A. Copella, Kevin J. Pease
  • Patent number: 5212373
    Abstract: In a non-contact IC card, when the card is in a standby mode of operation a CPU provides a command to inhibit the application of a clock signal to digital circuitry including the CPU and/or to inhibit the application of an operating voltage to analog circuitry, except for an antenna circuit and a trigger signal demodulating circuit, so that power consumption in the standby mode is reduced. For transfer of data between the IC card and an external device, a trigger signal derived by demodulating received data in the trigger signal demodulating circuit is used to apply the clock signal to said digital circuitry and the operating voltage to all of the analog circuitry.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: May 18, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shuzo Fujioka, Toshiyuki Matsubara, Shigeru Furuta
  • Patent number: 5200598
    Abstract: An optical reader for reading high density dibit encoded data from a data strip comprises an optical detector (13) and a detector (14,15,DSP) connected to the optical detector (13) and arranged to decode its output. The detector includes a row of photosensitive elements arranged to extend transversely across a row of dibits and to form an image of the row of dibits. The decoder (14,15,DSP) includes a buffer (15) arranged to store the row image. An image transform device detects a skew angle of the strip and transforms the stored image to compensate for the distortion of the image.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: April 6, 1993
    Inventor: Stephen C. Rencontre
  • Patent number: 5196679
    Abstract: An indicia printing/verifying apparatus and an indicia scanning method are disclosed, in which a scanner is shifted in the line feed direction while indicia is scanned by the scanner so that even the indicia having a small length in the line feed direction can be completely scanned by the scanner without decreasing the printing/verifying speed of the apparatus.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: March 23, 1993
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventor: Genzi Oshino
  • Patent number: 5194720
    Abstract: A method and apparatus for on-line evaluation of bar code symbol quality is disclosed in which bar code decoding and evaluation functions are integrated within a single unit. The integration of the bar code decoding and evaluation functions results in significantly more conclusive analysis of the quality of the bar code symbols as the analysis methodology and decoding process utilize a common scanning device. Thus, the ambiguities associated with hardware differernces between the decoding apparatus and stand alone bar code verifiers in evaluating the quality of the bar code symbols associated with conventional evaluation techniques are eliminated.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: March 16, 1993
    Assignee: Eastman Kodak Company
    Inventors: Alan R. Reinnagel, Lucas P. Curtis
  • Patent number: 5192859
    Abstract: A card carrier including pairs of rollers disposed at predetermined spacings along a card conveyer passageway such that the respective pairs of rollers hold both sides of a card therebetween. A driver including a single motor, a power transmission including a plurality of timing pulleys and a plurality of timing belts for transmitting the drive force of the motor to all the rollers, and power interrupting means including a clutch mechanism disposed between the power transmission and the motor for transmitting the drive force of the motor to the power transmission when the motor arrives at a predetermined rated rotational speed and a brake mechanism for stopping the operation of the power transmission instantaneously. When the motor arrives at the rated rotational speed, the clutch mechanism is actuated to drive all the rollers. When the card is to be stopped at a predetermined position, the drive force of all the rollers is stopped instantaneously by the clutch mechanism and the brake mechanism.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: March 9, 1993
    Assignee: Kabushiki Kaisha Nippon Conlux
    Inventors: Susumu Kojima, Masanori Tanaka
  • Patent number: 5191195
    Abstract: An access control ticket having three fields of data, a first field of fixed data, a second field of variable data, and a third field of variable data is read and information processed by a microprocessor. The microprocessor determines the validity of information on the ticket data fields and which of the variable fields has older data. Writing only occurs on (over) the variable field with invalid or older data. Upon subsequent use, the ticket contains current access data (just written) and last previous access data, as well as fixed field data. This added data (past use) can be used for statistical analysis or other purposes. More importantly, the added data field reduces read/write reliability problems. One improperly written variable data field does not invalidate ticket, only the last variable data entry. The microprocessor is programmed to overwrite invalid data in one of the variable data fields during the next use.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: March 2, 1993
    Assignee: Cubic Automatic Revenue Collection Group
    Inventor: Kenneth R. Aubrey
  • Patent number: 5189289
    Abstract: A bar code reading apparatus includes a bar code reader for generating, in a single operation, plural pieces of bar block data corresponding to a bar code having a number of digits which is a predetermined standard value, for example, 8 or 13. A detector detects the numbers of digits in each piece of bar block data generated by the bar code reader 11. A four digit memory and a six digit memory are used to store bar block data having four digits and six digits, respectively. A comparator detects whether or not the four digit memory and six digit memory each store bar block data. Each piece of bar block data output from the bar code reader 11 is stored in either the four digit memory or the six digit memory depending upon the number of digits detected by the digit detector. If the comparator determines that bar block data is stored in both the four digit memory and the six digit memory, then it is determined that the bar code reading operation is erroneous.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: February 23, 1993
    Assignee: Fujitsu Limited
    Inventor: Mitsuo Watanabe
  • Patent number: 5170046
    Abstract: A data transfer system for transmitting information from a portable device to at least one outside reading device, the portable device having first memory, the first memory storing the information which comprises a plurality of data blocks involving an error check data, the outside reading device reading the data blocks corrected by the error check data which is transmitted from the portable device.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: December 8, 1992
    Assignee: Sony Corporation
    Inventor: Susumu Kusakabe
  • Patent number: 5151582
    Abstract: In order to check if information stored on a card is authentic, the embossed character and figure information is compared with the information on the card. The rays radiated from the light emitting elements arranged in a line pass through a slit whose width is substantially equal to the thickness of embossed portions. Then, the rays are reflected on a card surface and received at an optical sensor consisting of LED elements arranged in a line as the card is in transit. The optical sensor is oriented in a manner to keep the same angle of reflection as the angle of incidence with respect to a normal. The light emitting elements are oriented to form another angle of incidence. These elements are used for reading the printed characters. To read a color pattern, a sensor having a photo detection sensitivity toward a normal of the card serves to receive the scattered rays reflected on the card, which rays are obliquely radiated to the card.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: September 29, 1992
    Assignee: Hitachi, Ltd.
    Inventor: Toshinori Fujioka
  • Patent number: 5151579
    Abstract: A method and apparatus for checking the correlation between all parts of a photofinishing order includes reading the identification numbers on at least some of the parts of the order using an optical character reader. The method includes processing the information received from the optical character reader to compensate for the inherent characteristics of optical character readers to misread portions of the numbers and includes a method of filtering misread and nonread information to prevent false alarm conditions in which an apparent mismatch is actually a misread, while minimizing the number of actual mismatches that are allowed through the system without causing an alarm. In one embodiment, a portion of the information is obtained in bar code form and a memory device is loaded with a table of bar code and optical character reader information for each order to maintain correlation between the order parts.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: September 29, 1992
    Assignee: Gregtag Systems, Inc.
    Inventor: Maxwell G. Maginness
  • Patent number: 5132522
    Abstract: An information-reading method employs an optical card including, a data section made by a linear information track, an address section for storing an address of the information track, and a guide section located adjacent to the address section and scanned before reading the address section. The address section and guide section are located at each end of said data section. The address and guide sections located at one end of the data section and the address and guide sections located at the other end of the data section are arranged in the same order in one scanning direction of the information track. The method comprises the steps of reading two addresses out of the address sections, by scanning the information track in the one scanning direction, and comparing the two addresses with each other, to thereby detect a tracking error.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: July 21, 1992
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Mitsuo Oshiba
  • Patent number: 5126540
    Abstract: An image recording apparatus provided with a reader for reading information for identifying the original image; a recorder for recording the original on a recording medium; a transporting unit for transporting the original to the reader and the recorder unit; a detector for detecting the presence or absence of the identifying information on the original; and a controller for selecting whether or not to record the original according to the outputs of the detector and the reader.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: June 30, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuo Kashiwagi, Masahiko Ito, Hirokazu Higuchi
  • Patent number: 5105074
    Abstract: A portable electronic device comprising a clock generator for generating a clock signal, a power supply for generating a first power supply voltage, a low-voltage generator for generating a second power supply voltage lower than the first power supply voltage in response to the clock signal, an instruction circuit for instructing start of the clock generator, and a supply circuit for, when a start instruction of the clock generator is generated by the instruction circuit, supplying the first power supply voltage to the clock generator, and after the clock generator is started by the first power supply voltage, supplying the second power supply voltage to the clock generator.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: April 14, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Seietsu Nara
  • Patent number: 5103080
    Abstract: A signal processor digitizer circuit is disclosed for reading bar code symbols by detecting the times at which a scanning light spot moves from a space onto a bar code symbol or moved from a bar code signal onto a space. The novel signal processor digitizer circuit obtains all of its information for digitizing, false transition rejections, and margin cleaning from the first derivative of an analog signal produced by a photodetector detecting the scanning light spot. The original analog signal and a second derivative signal are not used which results in several advantages. Since the original analog signal is not needed, the signal differentiator circuit is placed at a very early stage in an amplifier string. Additional amplification stages can then be used to amplify the differentiated signal until it is large enough to be digitized. This results in two benefits.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: April 7, 1992
    Assignee: Symbol Technologies, Inc.
    Inventor: Edward Barkan
  • Patent number: 5101410
    Abstract: A data transmission arrangement for a portable data storage medium, in which messages are transmitted between an external device and a portable data storage medium at a plurality of times in response to one readout command output from the external device. When malfunction occurs during the processing in the portable data storage medium, the portable data storage medium outputs an abnormality response to the external device, and then receives a continuous data demand command from the external device. Thereafter, a status data different from the status data included in the first message is sent from the portable data storage medium to the external device. The external device recognizes this sent status data. Thereafter, the data transmission started in response to one readout command is not discontinued and additional data continuous to be transmitted.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: March 31, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Niimura, Ryouichi Kuriyama
  • Patent number: 5101200
    Abstract: A toll paying system for use with a vehicle passing through a fast lane, having a toll booth. The toll paying system comprises detection means, class determining means, a wallboard, and a vehicle having both a first processor and a transmitter; a toll booth having antenna means, a receiver, a second processor, and camera means. The detection means may be embodied as a plurality of light beams traversing the fast lane with a plurality of light beam detectors. The light beam detectors generate a detection signal in response to a vehicle crossing the light beams. In general, the detection means generates a detection signal in response to detecting the presence of the vehicle in the fast lane. The class determining means may be embodied as an apparatus which determines the class of vehicle passing through the fast lane. The class of vehicle may be a car, truck, or any other type of class desirable for classifying vehicles passing through the toll paying system.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: March 31, 1992
    Inventor: Paul H. Swett
  • Patent number: 5076718
    Abstract: A data card for a printer includes a plurality of data areas. Data readable by a sensor can be written in the data areas to control specifications or functions of a serial printer. A standard mark is printed on the data card to provide a reference position. The serial printer includes the data card, a card receiver into which the data card is detachably inserted, a sensor for reading data written in the data card, and a carriage having a printing head thereon. Either the card receiver or the sensor is mounted to the carriage. The other component is fixedly arranged within the serial printer. The serial printer further includes a memory for storing the data, and a controller for controlling a printing mechanism according to the data stored in the memory.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: December 31, 1991
    Assignee: Seikosha Co., Ltd.
    Inventor: Koichi Sugino
  • Patent number: 5059773
    Abstract: A method of processing a signal in a bar code reader in which an optical signal provided by scanning a bar code is subjected to photo-electric conversion to provide an analog electrical signal, which is utilized to decode the bar code. The method includes scanning a bar code with a light beam whose diameter is small enough to detect thin bars and determining whether the bar code is a thin bar code or a thick bar code. If the bar code is the thick bar code, the reader employs data based upon analog electrical signals, whose frequency components higher than a first cut-off frequency determined for the thick bar code are cut off, as effective data. If the bar code is the thin bar code, the reader employs data based on analog electrical signals, whose frequency components higher than a second cut-off frequency determined for the thin bar code are cut off, as effective data.
    Type: Grant
    Filed: November 15, 1989
    Date of Patent: October 22, 1991
    Assignee: The Japan Steel Works, Ltd.
    Inventors: Masaharu Shimizu, Tatsuyuki Usami, Yoshihiro Saito, Nobuhiro Nakamura
  • Patent number: 5051779
    Abstract: An image processing system specifies input image information on the basis of existence of a special mark or patterns printed on a job control sheet. Selected one of various image processings is executed in accordance with the existence of the special mark or patterns to thereby obtain output image information. Each of the special mark or patterns are line drawings, each drawn so as to have a certain low correlative angle to longitudinal and transverse directions of an image provided with the special mark or patterns.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: September 24, 1991
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yuji Hikawa
  • Patent number: 5043563
    Abstract: A portable bar code scanner includes a base member and a overhanging scanning housing secured to the base member. A laser power supply mounted in the housing outputs a laser beam along a first light path directed to a compact optical system in the housing which reflects the laser beam along a second light path which intersects the first light path at approximately ninety degress to scan a coded label positioned below the scaning housing. A collection lens mounted in the housing collects and directs the reflected light from the coded label to a detector which generates electrical signals for transmission over a cable to a processor.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: August 27, 1991
    Assignee: NCR Corporation
    Inventors: Chen Chi, Ronald J. King, Herbert D. McClain
  • Patent number: 5019695
    Abstract: A card puncher for punching as a yardstick of use a card for getting coupon tickets on and used as tickets on omibuses and electric trains, and a method of controlling the card puncher. Data on a target quantity of conveyance of the card correponding to a position where the card is punched is stored in memory. A card conveyer is driven to convey the card by a quantity corresponding to data on the target quantity of conveyance stored in the memeory. A quantity of coast of the card after the drive of the card conveyer is teminated is measured. If the sum of the target quantity of conveyance and the measured quantity of coast of the card is within a predetermined allowable limit, the card is punched. If otherwise, data on the target quantity of conveyance in the memory is corrected such that the sum falls within the predetermined allowable limit, the card is returned to a position where the punching starts and the punching operation is retried.
    Type: Grant
    Filed: November 15, 1989
    Date of Patent: May 28, 1991
    Assignee: Kabushiki Kaisha Nippon Conlux
    Inventor: Eiji Itako
  • Patent number: 5018146
    Abstract: An electronic processor based system is provided which is capable of receiving plug-in cards. The plug-in card includes a memory which contains a first error check word which is a function of seed data words which are also stored in that memory. The first error check word is related to the seed data words by a predetermined algorithm. When the card is inserted in the processor system, the system reads the first error check word and the seed data words stored in the memory on the card. In one form, the processor system then performs its own independent calculation of a second error check word by using the same predetermined algorithm to operate on the seed data words retrieved from the card. The processor system compares the second error check word with the retrieved first error check word. If the second error check word is found to be the same as the retrieved first error check word, then the card is permitted to continue operation together with the system.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: May 21, 1991
    Assignee: GE Fanuc Automatinon North America, Inc.
    Inventor: Daniel W. Sexton
  • Patent number: 5004896
    Abstract: A method for optically scanning a document having preprinted marking positions is disclosed. According to the invention, the document has a specified format including rows of preprinted marking positions to be scanned. Document size in at least one direction is automatically measured at each row of preprinted marking materials before that row is scanned. The scanning of each row of preprinted marking positions is automatically adjusted to compensate for random variations in shrinkage and expansion of document size. Document skew relative to the scanning camera is automatically measured at each row of preprinted marking positions to be scanned before scanning each row, and an indication that scanning should not continue is provided if any skew measurement exceeds a predetermined skew limit.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: April 2, 1991
    Assignee: Educational Testing Service
    Inventors: Robert Serrell, J. Lamar Smith, Frederick L. Kurst
  • Patent number: 4985614
    Abstract: Apparatus and methods of verifying objects utilize an inherent randomly varying and detectable characteristic of a recordable magnetic region affixed to the object. Detectability of the randomly varying magnetic characteristic can be enhanced by recording a selected electrical signal thereon. Digital and analog signals may be used. Both saturation and nonsaturation forms of recording can be used. A verification apparatus senses the enhanced randomly varying magnetic characteristic and compares it to a prestored representative profile previously created. Correspondence between the prestored profile and the currently read characteristic indicates an authentic object. Other objects can be rejected.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: January 15, 1991
    Assignee: Rand McNally & Company
    Inventors: Kevin J. Pease, Robert A. Copella, Ann M. Flannery
  • Patent number: 4973830
    Abstract: A bit image converter for composing a decoder for converting the value of counting clocks loaded in response to the width of bars or spaces for composing a bar code into character information of a code reader is composed of a module number calculator for calculating the magnification of the basic module from the number of the modules for composing one code unit (one character), a module number total comparator for comparing the total sum of the number of the calculated modules with a specified number n of the modules, a module number corrector for correcting, if the number of the calculated modules is less than the specified number n (n-1), it to the specified number n, and a bit image output unit. Thus, the code reader is adapted for a multilevel bar code system so composed that a result becomes correct information by correcting, if the number of modules for composing one character is less than a specified number n, it.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: November 27, 1990
    Assignee: Alps Electric Co., Ltd.
    Inventors: Junichi Ouchi, Koji Nakase, Hiroaki Sasaki
  • Patent number: 4939354
    Abstract: A machine readable binary code which is dynamically variable in size, format and density of information is provided. The binary code is formed as a matrix having a perimeter and data contained therein. The perimeter is provided with density indicia for indicating the density of data contained within the matrix. The perimeter is also provided with size indicia for indicating the size of the matrix. By utilizing the density indicia and size indicia, a scanning device is able to calculate the size and information density of the binary code.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: July 3, 1990
    Assignee: Datacode International, Inc.
    Inventors: Dennis G. Priddy, Robert S. Cymbalski
  • Patent number: 4916294
    Abstract: A system for reliably recording digital data on marginal magnetic recording medium by utilizing a two-track format and testing to locate pairs of record-quality areas of the medium. A magnetic stripe on a document is defined into a pair of recording tracks each with a sequence of bit locations. Associated pairs of bit locations (one from each track) are jointly tested for recording quality. One bit location of poor quality eliminates the pair; however, if both bit locations meet a standard, they are employed cooperatively to record data. Specifically, each bit location initially is recorded with a pulse. Any pair of bit locations which cannot meet the standard is totally cleared (erased), while pairs of bit locations meeting the standard are selectively erased to represent digital data.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: April 10, 1990
    Assignee: Light Signatures, Inc.
    Inventor: Robert N. Goldman
  • Patent number: 4914709
    Abstract: A method for identifying a character which cannot be machine read so that the operator may observe and hopefully recognize the character in question. A bit-map video image of the unrecognized character(s) is inserted in the ASCII data line of neighboring characters to create an impression of the original line of text from the document. A data entry operator uses this information to enter the required correct character(s) via the keyboard or other means. This reject/reentry method allows for quick operator response, and minimizes data storage and transmission of video information.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: April 3, 1990
    Assignee: Eastman Kodak Company
    Inventor: Peter Rudak
  • Patent number: 4908502
    Abstract: A fault tolerant smart card is provided having primary functional units including a standard ISO interface, a first microcontroller, a clock, and main memory. Secondary functional units including a secondary microcontroller, secondary memory with bit checking capability and an alternate battery power source are also provided. A microcontroller error detector is connected to both microcontrollers. Should a discrepancy between microcontrollers occur known test patterns are run on the second microcontroller to determine which microcontroller is faulty. A private access port provides alternate access to information stored in the fault tolerant smart card. Registers for funds remaining, error condition and access account are also provided.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: March 13, 1990
    Assignee: Pitney Bowes Inc.
    Inventor: Winslow E. Jackson
  • Patent number: 4902882
    Abstract: A reliable electronic lock comprises means for reading a key card upon insertion and withdrawal. Sets of data read from the key card are compared to CRC data read from the key card to determine which set contains actual data and no false data erroneously read by the electronic lock. The CRC data is stored in scrambled form on the card to minimize the possibility of match to a set of actual and false data.
    Type: Grant
    Filed: September 23, 1987
    Date of Patent: February 20, 1990
    Assignee: Emhart Industries, Inc.
    Inventor: Gary E. Lavelle
  • Patent number: 4896025
    Abstract: An information reproducing apparatus comprising a detecting device for detecting information recorded in a plurality of information tracks on a record carrier, and an extracting device for extracting correct information from the information detected by the detecting device. This extraction is executed by evaluating plural information detected from each information track to extract the most correct information from the information or by identifying the information track, the information of which is detected, to extract the correct entire information deteted from the information tracks.
    Type: Grant
    Filed: March 30, 1989
    Date of Patent: January 23, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koyo Hasegawa
  • Patent number: 4870260
    Abstract: The present invention is a method and apparatus for validating a valuable document such as a debit card. The valuable document includes a plurality of value markings arranged to form a code word. Illustratively, the value markings may be optical elements capable diffracting incident optical radiation. Alternatively, the value marking may be electrical elements such as safety fuses, diodes or transistors, the presence or absence of the electrical element representing a logic "1" or logic "0" respectively.In accordance with the present invention, the code word is first read to determine if it is valid. If the code word is valid, one or more value markings are erased, in each of plurality of erasing steps, until, illustratively after the final erasing step all of the value markings are erased. After each erasing step, the erased and remaining unerased validations markings form a new code word. If the sequence of new code words corresponds to a predetermined sequence of code words a signal is produced.
    Type: Grant
    Filed: August 20, 1986
    Date of Patent: September 26, 1989
    Assignee: LGZ Landis & Gyr Zug AG
    Inventors: Andrzej Niepolomski, David Greenaway
  • Patent number: 4866545
    Abstract: A system and method for embossing a plurality of lines and recording encoded tracks of digitally encoded characters for credit cards is disclosed. The system provides an improved recording station for sequentially recording the characters and verifying that the characters were recorded without error. The improved method verifies the accuracy of the encoded data by a comparison of recorded data with data which was the source of the recorded data.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: September 12, 1989
    Assignee: National Business Systems, Inc.
    Inventors: Richard J. LaManna, James L. Hinton, Edward L. Cucksey, Leo Kull
  • Patent number: 4864111
    Abstract: A numerical instrument comprising a first location array defining a plurality of digit location for entry of numerals to define a number amount and a second location array in the form of a grid having rows corresponding to numbers and columns corresponding to digit locations, whereby the grid may be filled in to correspond to the number amount indicated in the first location array.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: September 5, 1989
    Inventor: Semo Cabili
  • Patent number: 4860226
    Abstract: Method and apparatus for reading, by an end user scanner, the UPC number designated by a bar code printed on or associated with a predetermined number of packages or containers for or containing goods to determine the percentage of correctly read UPC numbers with reference to the predetermined number of readings.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: August 22, 1989
    Inventors: Edward L. Martin, Fred G. Graham, Benjamin Roman
  • Patent number: 4852101
    Abstract: An apparatus for recording optical cards wherein checking words or inspection words based upon an error correction code are added to information data signals to be recorded, and signals which have been scrambled are recorded in the form of a block that can be optically read onto a belt-like optical recording medium of a card at intervals of a predetermined number of words that are distributed for a data track, and/or an apparatus for reproducing optical cards wherein signals that are read from the thus recorded optical card by a card reader, are descrambled thereby to reproduce the original data signals.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: July 25, 1989
    Inventors: Shoei Kobayashi, Takuya Wada, Shinichi Yamamura
  • Patent number: 4845717
    Abstract: According to a portable electronic apparatus processing system of this invention, an IC card has two output buffers. When the IC card cannot normally receive an instruction sent from an IC card reader/writer, the IC card sets a message indicating this in the first output buffer. On the other hand, when the IC card can normally receive the instruction from the IC card reader/writer, the IC card executes corresponding processing and sets the processed result in the second output buffer. As a result, the normally processed result is not broken upon setting an error message.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: July 4, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yasuo Iijima
  • Patent number: 4837426
    Abstract: Apparatus and methods of verifying objects utilize an inherent randomly varying and detectable characteristic of a recordable magnetic region affixed to the object. Detectability of the randomly varying magnetic characteristic can be enhanced by recording a selected electrical signal thereon. Digital and analog signals may be used. Both saturation and nonsaturation forms of recording can be used. A verification apparatus senses the enhanced randomly varying magnetic characteristic and compares it to a prestored representative profile previously created. Correspondence between the prestored profile and the currently read characteristic indicates an authentic object. Other objects can be rejected.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: June 6, 1989
    Assignee: Rand, McNally & Company
    Inventors: Kevin J. Pease, Robert A. Copella, Ann M. Flannery
  • Patent number: 4792018
    Abstract: A system for processing articles selected for purchase and bearing distinct identification codes comprises, in one version: (a) a code reader for generating an output signal indicative of such article identification code; (b) a conveyor for receipt and transport of such article; (c) an entrance sentry for defining an inlet to a secured zone extending along a portion of the conveyor and for generating an output signal indicative of entry of the article into the secured zone and of a measurable characteristic of the article; and (d) a controller for selective movement of the conveyor in respective article acceptance and article rejection senses.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: December 20, 1988
    Assignee: CheckRobot Inc.
    Inventors: David R. Humble, David L. Gentzler, Steven J. Tilidetzke
  • Patent number: 4780602
    Abstract: When data is written in a predetermined memory area of a data memory in an IC card, a comparator checks whether the data before writing and data actually written in the data memory coincide. In the event of non-coincidence of the compared data, the data to be written is written in a different memory area of the data memory.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: October 25, 1988
    Assignee: Casio Computer Co., Ltd.
    Inventors: Shigeyuki Kawana, Harumi Nakano
  • Patent number: 4760574
    Abstract: A method and apparatus for maintaining correlation between the parts of a film processing order from its receipt in a lab to its assembly for return to the customer includes placing a machine-readable identifier on the film, envelope and prints. The identifiers are read at the point of final order assembly and if any identifiers are not readable an error counter is incremented. If the error counter reaches a predetermined maximum number, an alarm is given and the operation is halted for operator intervention. If the maximum error number is not reached, the identifiers read at the finishing station are compared for equality. If there is a mismatch between identifiers, an alarm is given and the operation halted for operator intervention. Each time an order is successfully processed with no misreads, the error counter is decremented by some predetermined number. In a predetermined embodiment, the error counter is reset after each operation intervention.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: July 26, 1988
    Assignee: CX Corporation
    Inventors: Janice I. Budworth, Donald F. Knull, Maxwell G. Maginness
  • Patent number: 4747058
    Abstract: A document processing system for reading a line of MICR data from documents passing along a document track and for generating a marker to be positioned over a character which was not read properly when that line of MICR data is presented on a display. A special thresholding circuit is used to convert the image data of the line of MICR data to binary data. The circuit automatically adjusts for changes in light intensity at the associated scanning line where the image data is generated.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: May 24, 1988
    Assignee: NCR Corporation
    Inventor: Benedict C. M. Ho
  • Patent number: 4742521
    Abstract: A method and apparatus for confirming bar code information in a bar code printer. The information to be printed includes informational digits and two check digits. The first check digit is manually inputted by the operator along with the informational digits. The second check digit is automatically calculated and should have the same value as the first check digit. The data is further confirmed by comparing the first check digit with a calculated value obtained by performing an automatic calculation based on the informational digits.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: May 3, 1988
    Assignee: Tokyo Electric Co., Ltd.
    Inventor: Manabu Nishida
  • Patent number: 4722444
    Abstract: Document processor equipment for processing documents requiring operator intervention for the purpose of functions like key entry and encoding of data associated with certain ones of the documents includes an improved system for transporting and presenting documents to the operator for such intervention. A document view station has split parallel transport paths for routing documents requiring operator intervention to the front path near the operator with documents not requiring operator intervention being routed to and along a rear path, the respective routing being effected by a diverter automatically controlled in response to information read from the documents. A preview station and document hold station are respectively provided upstream and downstream from the document view station.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: February 2, 1988
    Assignee: BancTec Inc.
    Inventors: Gary J. Murphy, Roy E. Dempster, Jr., Michael R. Barnes, Michael J. Murphy
  • Patent number: 4711993
    Abstract: A fraud-resistant manually-fed reader-writer is especially suited for debit card use, in which a credit balance is read into the memory of the reader. When the card reaches the end of its insertion-reading movement, a validity indication encoded on the magnetic stripe of such card is automatically eradicated by energizing a de-gaussing coil. If, after effecting transactions which debit the memory, the card is removed by some artifice without re-writing it with a reduced balance, such removed card will lack a validity indication and hence be incapable of re-use. Provisions are made to time the re-writing and to avoid forfeiture of the balance if the card should be withdrawn too slowly or too rapidly.
    Type: Grant
    Filed: May 20, 1985
    Date of Patent: December 8, 1987
    Inventors: Joseph F. Kosednar, Merlyn W. Barth
  • Patent number: 4676343
    Abstract: The check-out counters for use in a supermarket, or the like, are provided with a laser scanner for reading the UPC labels on the individual products presented to it by each customer. The counters are also provided with transport belts or conveyors controlled by a central processor which, in turn, is supplied with information from a weigh scale under the input conveyor and from optical curtain devics at strategic locations along the belts and in a bagging area. The outfeed conveyor operates through a tunnel such that a customer cannot reach a product being conveyed therethrough. An opticl curtain disposed at the entry to the tunnel is broken by passage of an article into the tunnel and also by a customer reaching into the tunnel. Products are conveyed to the bagging area if (1) the actual weight of the product as determined by the scale corresponds to the anticipated weight obtained from a memory bank based upon the product UPC label identification and (2) none of various other events have occurred.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: June 30, 1987
    Assignee: CheckRobot Inc.
    Inventors: David R. Humble, David L. Gentzler, Steven J. Tilidetzke