Patents Represented by Law Firm Limbach, Limbach & Sutton
  • Patent number: 5220280
    Abstract: In the present invention a method of testing a partially completely assembled module with integrated circuit dies mounted thereon is disclosed. The partially-completely assembled module has one or more first locations with integrated circuit dies mounted thereon and one or more second locations with integrated circuit dies to be mounted thereon and one or more electrical paths electrically connecting the first and second locations. A supplementary module with one or more electrical components assembled in the second locations and with one or more electrical components to be assembled in the first locations and with electrically identical electrical paths connecting the first and second locations as the testing module is also provided. The testing module and the supplementary module are mated together by electrically connecting the first and second locations of the testing module to the first and second locations of the supplementary module, respectively.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: June 15, 1993
    Assignee: VLSI Technology, Inc.
    Inventors: Thomas A. Visel, John F. Stockton
  • Patent number: 5185602
    Abstract: The perception of grayscale shading on a digitally commanded display is produced by commanding pixels of the display with brightness-setting signals of differing average duty cycles. Brightness-setting signals having one brightness level associated with them are phase shifted in relation to time and distributed to spaced apart pixel locations at which the one brightness level is to be produced. The energization of spatially adjacent pixels is scattered in time and pixels which are energized at the same time are selected to be spatially scattered so as to avoid the perception of visual disturbances such as flickering and surface streaming.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: February 9, 1993
    Assignee: Cirrus Logic, Inc.
    Inventors: Chester F. Bassetti, Jr., Dayakar C. Reddy, Ekaputra Laiman, Bryan M. Richter
  • Patent number: 5184020
    Abstract: A device comprising a light source, a sample holder and a temperature control chamber. The sample holder supports the vessels in a fixed relationship relative to the light source. The temperature control chamber surrounds the sample holder and vessels, so that a temperature control fluid may be passed around the sample vessels effectively maintaining the temperature of the sample vessels within a desired temperature range.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: February 2, 1993
    Inventors: David P. Hearst, George D. Cimino, John E. Hearst, Stephen T. Isaacs
  • Patent number: 5124991
    Abstract: The present invention is for a method for correcting errors in received data during transmission of infrared radiation from a transmitter to a receiver without retransmitting entire packets. The method includes the steps of detecting an error in received data. A negative acknowledgement signal is transmitted from the receiver to the transmitter. A predetermined acknowledgement is transmitted by the transmitter to indicate to the receiver that the negative acknowledgement signal has been received. The data is then retransmitted.The data is transmitted using pulse position modulation. An error is detected by either sensing two pulses within one cycle or sensing no pulses within one cycle.The negative acknowledgement signal comprises transmitting a pulse several positions in duration. The predetermined acknowledgement by the transmitter includes purposely transmitting a cycle containing a known error.
    Type: Grant
    Filed: March 30, 1989
    Date of Patent: June 23, 1992
    Assignee: Photonics Corporation
    Inventor: Richard C. Allen
  • Patent number: 5124998
    Abstract: A sealed laser plasma tube for use in a gas laser system. A Brewster window seals one end of the tube (the cathode end, in a preferred embodiment), and an end mirror which seals the opposite tube end (the anode end, in a preferred embodiment). In a laser system embodying the invention, a second end mirror is positioned adjacent to, but spaced from, the Brewster window. Intra-cavity elements may conveniently be inserted and replaced in the region between the sealed Brewster window and the second end mirror. The sealed mirror which seals the tube end opposite the window is preferably coated with at least an outermost layer of Hafnium oxide, to protect it from hard UV radiation originating within the plasma tube. The inventors have recognized that the problem of sealed window degradation is substantially less severe at the cathode end of an ion laser plasma tube, and that the sealed window should be attached at the tube end at which the window degradation problem is less severe.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: June 23, 1992
    Assignee: Coherent, Inc.
    Inventors: Marco Arrigoni, Gerald C. Barker, William Kolb, Benjamin Cook, Joseph Fraizer
  • Patent number: 5109524
    Abstract: A digital processor has a controller, a data converter, a data register, and a logarithmic calculator. The processor has an address bus and a data bus for communication therewith. The address bus is connected to the controller. The data bus is connected to the controller and to the data register. Program instructions from the data bus are supplied to the controller and data on the data bus are supplied to the data register. Program instructions supplied to the controller are decoded and internal program instructions are generated by the controller. The controller communicates with the data converter, data register, and the logarithmic calculator via an internal bus through the internal program instructions. Integer data from the data bus are stored in the data register. The data converter receives the integer data, converts it into logarithmic data, and stores it in the data register.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: April 28, 1992
    Assignee: VLSI Technology, Inc.
    Inventors: Lawrence F. Wagner, Korbin S. Van Dyke, Wayne P. Burleson, Robert D. Hemming, John P. Guadagna
  • Patent number: 5101415
    Abstract: An improved laser mirror (22) is disclosed with wavelength selective coatings on the inner and outer surfaces (32) and (34) thereof. The coating on the inner surface (32) is reflective of light in a first wavelength region (36) and transmissive of light in a second wavelength region (38). The outer surface (34) is reflective of light in the second wavelength region ( 38). In the preferred embodiment, one of the surfaces of the mirror is planar and the other is curved to facilitate alignment. The different curvatures of the inner and outer surfaces allows the diameter of the beam of the two wavelength regions to be independently controlled allowing optimization of the mode generated by the laser (20).
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: March 31, 1992
    Assignee: Coherent, Inc.
    Inventors: William P. Kolb, Benjamin H. Cook, Jr.
  • Patent number: 5099505
    Abstract: Disclosed is a method for increasing the accuracy of images obtained in radiation therapy apparatus, such as a computed tomography simulator which employs an image intensifier and a photodiode detector for converting light from the image intensifier to electrical signals for further processing. The method recognizes that a significant amount of crosstalk can exist in the image intensifier and photodiode detector chain and provides a series of steps for adjusting the electrical signals obtained from the photodiode detector to compensate for the crosstalk.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: March 24, 1992
    Assignee: Varian Associates
    Inventors: Edward J. Seppi, Edward G. Shapiro, John M. Pavkovich
  • Patent number: 5099101
    Abstract: An automatic laser trimming apparatus (30) for semiconductor integrated chip packages removes dambars (16) and performs deflashing and degating operations. The apparatus combines a laser machining subsystem (32, 36) with a machine vision subsystem (38, 40) to accurately locate and treat the dambars on an integrated circuit package. A defocusing lens (54) is used to attenuate the intensity of the laser beam (34) to permit a single laser to perform both the dambar removal and deflashing operations. In addition, an improved fixture (46) is provided to enhance the removal of smoke and debris from the processing station and to provide improved backlighting thereby enhancing resolution.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: March 24, 1992
    Assignee: National Semiconductor Corporation
    Inventors: Michael A. Millerick, Michael W. Patterson
  • Patent number: 5097491
    Abstract: A Gray Code counter is provided having synchronous, modular circuits for each of the three types of bit positions, i.e., least significant bit ("LSB"), most significant bit ("MSB") and middle bit ("MB"). One LSB and MSB circuit each are used with as many MB circuits in between as are necessary to provide a counter having the desired number of bits. The LSB, MSB and MB circuits' designs are truly modular in that duplicate MB circuits can be freely coupled together between an LSB circuit and an MSB circuit to provide the desired number of counter bits without modifying any input or output interfaces between the circuits. The counter can count either up or down in accordance with a normal Gray Code sequence.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: March 17, 1992
    Assignee: National Semiconductor Corporation
    Inventor: Christopher M. Hall
  • Patent number: 5091975
    Abstract: In the present invention a method of compressing a signature signal is disclosed. The signature signal is divided into a plurality of signature segment signals where each segment is encoded by using a modified ring-encoding method, such that the total number of grid points along the perimeter of all the rings can be stored in an 8-bit byte. In one embodiment of the method of the present invention, a Fibonacci series is used to determine the relative spacing of the rings. The present invention also discloses a method and apparatus for electronically processing a POS transaction with a human signature for verification of the transaction, as well as for request of extension of credit by a credit company. The signature is electronically captured, compressed and combined with a transaction signal which is representative of the transaction. The record signal is then processed by the credit company for verification of the transaction or for requesting extension of credit.
    Type: Grant
    Filed: January 4, 1990
    Date of Patent: February 25, 1992
    Assignee: Teknekron Communications Systems, Inc.
    Inventors: Toby Berger, Daniel H. Miller
  • Patent number: 5091091
    Abstract: Disclosed is extracorporeal plasma perfusion over a therapeutic immobilized protein A (staphylococcal), SPA. The perfused plasma is returned to the host or can be taken off one person and used to treat another and stored in perfused plasma banks. Immobilized protein A quantities, volumes of plasma perfused and the rate of administration based on clinical and toxicity evaluations are set forth. A non-toxic drug infusion during the immediate postperfusion period obtains an observed tumoricidal response far exceeding those due to the extracorporeal plasma perfusion or drug infusion alone representing an in vivo synergism between the perfused plasma and the drug. Also disclosed are the therapeutic protein A cartridge, its loading and delivery system, and a miniaturized immunoabsorbent apparatus enabling the processing of serum samples for testing small quantities of plasma.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: February 25, 1992
    Inventor: David S. Terman
  • Patent number: 5091328
    Abstract: Method for late programming of MOS integrated circuit devices. A second or third level conductive layer is used as a device selection mask for transporting dopant from a doped gate (formed from a first level conductive layer) into the channel region of selected field effect transistors.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: February 25, 1992
    Assignee: National Semiconductor Corporation
    Inventor: William E. Miller
  • Patent number: 5091327
    Abstract: A method for fabricating a split-gate EPROM cell utilizing stacked etch techniques is provided. In accordance with a preferred embodiment of the method, a layer of silicon dioxide is formed on a P- silicon substrate. A layer of polysilicon is formed on the silicon dioxide layer, followed by growth of an oxide/nitride/oxide (ONO) layer. The ONO and polysilicon layers are etched to define floating gates. Next, an edge of each floating gate is utilized in a self-aligned implant of buried N+ bit lines. The floating gate extends only over a first portion of the channel defined between the adjacent buried bit lines. A differential oxide layer is grown on the substrate between adjacent floating gates in a low temperature steam oxidation step. That is, the oxide formed over the exposed portion of the buried N+ bit line is thicker than the oxide formed over the exposed portion of the channel.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: February 25, 1992
    Assignee: National Semiconductor Corporation
    Inventor: Albert M. Bergemont
  • Patent number: 5090789
    Abstract: A laser light show device and method produces a surface projected or suspended holographic image, and includes multiple image projectors. One image projector provides the object image information representing the primary subject. For surface projections, additional background image projectors provide background image information generated using a wobbler plate-reflected beam diffracted through a spherical lens, a beam unidimensionally diffracted through a rotating cylindrical amorphic dipolyhedral lens, and a beam diffracted through multiple diffraction gratings. A suspended holographic image is produced by parabolically focusing multiple images projected onto a spherical image screen.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: February 25, 1992
    Inventor: Allen E. Crabtree
  • Patent number: 5089979
    Abstract: The present invention is for digital calibration of plug-in transducers and the like. The invention comprises means for digitally storing error-correcting tables in a physical location which is associated with the transducer, and a means for interpreting those tables.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: February 18, 1992
    Assignee: Basic Measuring Instruments
    Inventors: Alexander McEachern, Frederic W. Nitz, Scott C. Terry
  • Patent number: 5089704
    Abstract: A ceiling mounted infrared intrusion detection system achieves 360-degree viewing capability by employing concentric rings of mirrors arranged to view multiple segments within an annular volume of space and focus on a centrally located detector. The rings of mirrors have multiple facets, each of which facets reflects radiation from a segment of space being viewed and focuses the radiation on the detector. The rings are disposed in spaced relationship to one another to provide shorter focal lengths for the mirror facets disposed to view space closest to the detector and a path between the rings through which reflected radiation focused on the detector may pass. the centermost ring is open to permit the detector to view directly therethrough.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: February 18, 1992
    Assignee: C & K Systems, Inc.
    Inventor: Joseph R. Perkins
  • Patent number: 5083492
    Abstract: The invention relates to a guitar tremolo system, a tremolo unit being received in a recess in the body of the guitar, a base block which has string riders being maintained with provision for horizontal pivoting and balanced by tension springs. Multi-subdivided base blocks (5) are disposed in a vertically adjustable mounting frame (1) having bearings for tremolo pivot pin (2) around which a base block actuator (3) and the various base blocks (5) are mounted for rotation. Also the base blocks (5) are securable at choice to the underside of the actuator (3) and are connected to individually operating tension springs (13).
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: January 28, 1992
    Inventor: Joachim Gorr
  • Patent number: 5080093
    Abstract: A self-contained, high capacity nebulizer, having automatic mixing and temperature control features is provided. The nebulizer may be adapted for use in conjunction with mechanical respirators, ventilators, or breathing machines, and for this purpose will use electrical signals generated by or received from the respirator to automatically control the nebulizing and mixing functions such that nebulization occurs intermittently, that is, only during the inhalation phase of the respiratory function. The nebulizer may also be adapted for manual and/or continuous use by providing an external electrical signal generator to manually control the nebulization and mixing functions.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: January 14, 1992
    Assignee: Vortran Medical Technology, Inc.
    Inventors: Otto G. Raabe, James I. C. Lee
  • Patent number: 5080518
    Abstract: An earring device comprises an ornamental element bearing means from which at least two thin ornamental elements are hung. These ornamental elements are thin cross-sectional (x,y -axes) depictions of animals, which when arranged on the bearing means, provide a three-dimensional illusion. In a preferred embodiment, the animal head and front quarter are depicted on a first thin ornamental element, and the animal rear quarter is depicted on a second element. When hung from the bearing means, spacers are provided to create a separation between the thin ornamental elements in a z-axes. This separation creates an illusion of depth along the z-axis, leading to a three dimensional depiction of the animal.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: January 14, 1992
    Assignee: Harry Mason, Inc.
    Inventor: Harry Mason