Patents Represented by Attorney Rolland R. Hackbart

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  • Cellular cordless telephone
    Patent number: 4989230
    Abstract: A cellular cordless telephone (10) operates with both a cordless base station (180) and a cellular base station (190) and cellular control terminal (196). In one embodiment (FIG. 2), a cellular cordless telephone (100) includes a cellular transceiver (120), antenna (128), keyboard (140), a display (180), handset (160), and microcomputer (130) together with a cordless transceiver (110) and antenna (118), all of which may be in a single housing. In another embodiment (FIG. 3), a cellular cordless telephone (200) includes a cellular telephone (220) and a cordless telephone transceiver (210) which may be a plugable module. Whenever cellular cordless telephone (10) is within range of cordless base station (180), telephone calls may be made over the cordless radio channel or transferred from the cellular radio channels to the cordless radio channel.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: January 29, 1991
    Assignee: Motorola, Inc.
    Inventors: Steven F. Gillig, Glen E. Pederson
  • Method and apparatus for decoding of frequency inversion based scramblers
    Patent number: 4984219
    Abstract: A method and apparatus for decoding of frequency inversion based scramblers is disclosed. A quadrature amplitude modulation detector determines the frequency of the tone used for inverting the scrambled signal by determining which of a plurality of quadrature detector pairs, each using a different conversion frequency, has the greatest magnitude difference between the quadraturely related signals. The frequency of the quadrature pair with the greatest difference is the frequency of the inverting tone during the inverting period of time. This frequency information is used to generate a reinversion tone to unscramble the scrambled signal.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: January 8, 1991
    Assignee: Motorola, Inc.
    Inventors: Daniel P. Brown, Larry C. Puhl
  • Method of processing cellular telephone call detail data for billing multi-line customers for cellular telephone services
    Patent number: 4979207
    Abstract: A unique cellular telephone billing system (100) processes call detail records (102) of cellular telephone calls made by users of multi-line customers to produce invoices and reports. The call detail records (301 and 302) for each user of a multi-line customer include a unique key identification number (311 and 321) and may include an information format (401 and 402) having variable-length sub-fields (411-415 and 421-423). Call detail records (102) with key identification numbers are pooled into files (110) and then sorted for each multi-line customer by key identification number and corresponding information format to produce consolidated billing and usage information for all of the cellular telephones as well as individual invoices for each of user-employee of each multi-line customer.
    Type: Grant
    Filed: February 1, 1990
    Date of Patent: December 18, 1990
    Assignee: Motorola, Inc.
    Inventors: David M. Baum, Andrea E. Bradshaw, Christopher G. McClain
  • Differential pair, push-push oscillator
    Patent number: 4977379
    Abstract: A differential pair, push-push oscillator for generating clocking signals. This oscillator consists of two, single transistor oscillators that both oscillate at f.sub.o with a 180.degree. phase difference. The phase difference is caused by the direct connection of the transistors' drains. A current source, connected to the transistors' drains, biases the transistors. The common drain connection also serves as an output for the differential pair, push-push oscillator. This output, a stable, relatively high power signal of frequency 2f.sub.o, is a composite of the two signals from the single transistor oscillators.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: December 11, 1990
    Assignee: Motorola, Inc.
    Inventor: Ronald F. Kielmeyer
  • Multiplexed synchronous/asynchronous data bus
    Patent number: 4972432
    Abstract: A multiplexed synchronous/asynchronous data bus is disclosed in which three bus lines are used to convey bidirectional synchronous data between at least two data devices at a relatively low data rate. Half duplex asynchronous data is applied at a higher data transfer rate to one of the three bus lines when another of the bus lines is held in a logic high state.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: November 20, 1990
    Assignee: Motorola, Inc.
    Inventors: Gregory P. Wilson, Bryan A. Potratz, Thomas J. Walczak, Jeffery L. Mullins
  • Method for radiotelephone autonomous registration
    Patent number: 4972355
    Abstract: A cellular radiotelephone autonomous registration method. The radiotelephone attempts registration when a clock count transmitted by the system equals or exceeds the radiotelephone's threshold count (201). The radiotelephone then scans (202) available channels for proper signal strength and attempts to seize that channel (203). If the channel seizure fails, the threshold count is updated with the clock count plus a random integer (207) and the next channel seizure attempt is made when the next master clock value equals or exceeds this value. This method increases the length of time between failed channel seizure attempts, thereby decreasing the load on the radiotelephone's power source.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: November 20, 1990
    Assignee: Motorola, Inc.
    Inventor: Jeffery L. Mullins
  • Dual-bandwidth cellular telephone
    Patent number: 4972455
    Abstract: A unique dual-bandwidth cellular telephone includes a transceiver (100) having a dual bandwidth receiver, an audio/logic unit (200) having dual control programs, and a handset unit (300). The dual bandwidth receiver of the transceiver (100) has different filters (408 and 410) in the intermediate frequency section thereof which are switchably selected depending on which cellular telephone system is available. When service is not available in one of the cellular telephone systems, the unique cellular telephone automatically switches the receiver bandwidth and control program for operating on the other cellular telephone system.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: November 20, 1990
    Assignee: Motorola, Inc.
    Inventors: Sharon E. T. Phillips, Scott N. Carney
  • Tuneless monolithic ceramic filter manufactured by using an art-work mask process
    Patent number: 4965537
    Abstract: A ceramic filter employs a novel tuning process which avoids the necessity of etching or abrading plating on the surface of the filter. The tuning is provided by determining a selected frequency related characteristic of the dielectric making up the block portion of the ceramic filter. For example, the quarter wave length frequency of the block may be measured. Next, plating artwork is designed in accordance with the determined selected frequency related characteristic. The artwork is then used for selectively applying a conductive material to a surface of the block in order to shift the determined selected frequency related characteristic to a desired (specified) frequency characteristic. By appropriately designing the artwork based on the determined selected frequency related characteristic, no etching or abrading to the plating on the block is required.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: October 23, 1990
    Assignee: Motorola Inc.
    Inventor: Richard S. Kommrusch
  • Stripline filter with combline resonators
    Patent number: 4963843
    Abstract: A combline stripline filter includes a number of conductive strips, each connected to ground on one end and capacitively loaded to ground at the other end. Input and output pads will make a surface mountable connection to a printed circuit board. Tuning is provided for by removing ground over the extension ends of the outside resonators. The center resonators are tuned by removing metal from areas on the cover that are connected to the resonators by plated through holes. Undesired capacitance is compensated for by rounding the ends of the resonators and the opposing ground planes.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: October 16, 1990
    Assignee: Motorola, Inc.
    Inventor: David S. Peckham
  • Battery charger housing for batteries of differing dimensions
    Patent number: 4963812
    Abstract: A battery charger for charging batteries of varying sizes is disclosed. Batteries to be charged are inserted into a recess in the battery charger housing and are captivated by a lip portion which extends into the recess. The lip portion has a plurality of surfaces, one of which surfaces contacts a surface of a battery of one size and maintains the position of the battery against the charging contacts of the battery charger. Different size batteries contact different lip surfaces.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: October 16, 1990
    Assignee: Motorola, Inc.
    Inventors: Nicholas Mischenko, Albert L. Nagele
  • Dialing features for cellular telephone with standard telephone set
    Patent number: 4959851
    Abstract: A unique cellular telephone (100) connects to a standard telephone set (101) for providing cellular telephone services to subscribers in remote locations not served by a landline telephone system. Cellular telephone (100) includes a cellular telephone transceiver (109), microcomputer (108) and circuitry (102-106) for interfacing the cellular telephone transceiver (109) to the telephone set (101). The interface circuitry (102-107) provides the audio, voltage and dial signal interface to the telephone set (101). The microcomputer (108) controls the interface circuitry (102-106) and is responsive to the telephone set (101) for answering and placing cellular telephone calls. The microcomputer (108) also is responsive to dialing sequences including numerical digits preceded and followed by the # digit for selecting cellular telephone features.
    Type: Grant
    Filed: May 10, 1989
    Date of Patent: September 25, 1990
    Assignee: Motorola, Inc.
    Inventors: Francis P. Tobolski, Jr., Robert F. D'Avello
  • Digital pattern decoder
    Patent number: 4956854
    Abstract: A decoder decodes a predetermined binary pattern from within a data stream, wherein the pattern includes a repetitious series of binary digits and each series of digits is composed of 2N bits, N being a positive integer greater than 1, and the first N bits is the complement of the second N bits of the series. The decoder includes a bit synchronizer for synchronizing to the bits of the pattern, a digital phase locked loop for generating a clock signal from the received data, a comparator and memory for analyzing the data stream in an alternating manner so as to generate N paths, wherein each path receives every Nth respective bit of the data stream, and an arithmetic logic unit for calculating and measuring the integrity of the pattern in the received data.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: September 11, 1990
    Assignee: Motorola, Inc.
    Inventor: Dale F. Bengtson
  • Multiple resonator dielectric filter
    Patent number: 4954796
    Abstract: A duplexer for a radio transceiver is disclosed in which two volumes of dielectric material each have at least two holes and each is covered with a conductive material except for one surface. An electrode on the one surface of each volume is coupled to one of the holes and is coupled to a substrate via a terminal passing through a mounting device. The substrate provides coupling between the terminals of the two volumes and a common antenna.
    Type: Grant
    Filed: August 10, 1988
    Date of Patent: September 4, 1990
    Assignee: Motorola, Inc.
    Inventors: Steven R. Green, David M. De Muro, Michael F. Moutrie, Raymond L. Sokola, Phillip J. Gordon
  • Housing for a portable cellular handset telephone or similar article
    Patent number: D309301
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: July 17, 1990
    Assignee: Motorola, Inc.
    Inventors: Leonid Soren, Albert L. Nagele
  • Portable radiotelephone or similar article
    Patent number: D309451
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: July 24, 1990
    Assignee: Motorola, Inc.
    Inventor: Albert L. Nagele
  • Battery charger or similar article
    Patent number: D314173
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: January 29, 1991
    Assignee: Motorola, Inc.
    Inventors: Leonid Soren, Gary R. Weiss
  • Battery charger or similar article
    Patent number: D315330
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: March 12, 1991
    Assignee: Motorola, Inc.
    Inventors: Leonid Soren, Gary R. Weiss, Albert L. Nagele
  • Portable radiotelephone or similar article
    Patent number: D315346
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: March 12, 1991
    Assignee: Motorola, Inc.
    Inventor: Albert L. Nagele
  • Electrical connector
    Patent number: D315543
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: March 19, 1991
    Assignee: Motorola, Inc.
    Inventors: Leonid Soren, Gary R. Weiss
  • Housing panel for a telephone handset or similar article
    Patent number: D315565
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: March 19, 1991
    Assignee: Motorola, Inc.
    Inventor: Terrance N. Taylor