Patents by Inventor Patrick S. Grant

Patrick S. Grant has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Memory based vector quantization
    Patent number: 5300931
    Abstract: Apparatus is provided for performing two stages of high-speed compression of vector data inputs. Two input channels of vector data are compressed and encoded through a vector quantizer encoder to provide a first stage of data compression. The output of the first encoder is further decoded then compressed and encoded in a novel high-speed computing mapping means which may be implemented in the form of a look-up table. Vector quantized encoded output is double the previous data compression of a single stage. The second stage of data compression causes very little degradation of the data from the first stage of data compression.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: April 5, 1994
    Assignee: UNISYS Corporation
    Inventors: Robert A. Lindsay, Patrick S. Grant, Val D. Vaughn
  • Radiation-controlled filter with photoconductor means and feedback thereto
    Patent number: 5162646
    Abstract: Embodiments disclose an adjustable filter (cf voltage-controlled bandwidth) having photoconductors whose resistance is adjusted by variable-intensity radiation source means, with a related feedback loop to compensate for thermal changes.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: November 10, 1992
    Assignee: Unisys Corp.
    Inventors: Bruce H. Williams, Valjean P. Snyder, Patrick S. Grant
  • Adjustable radiation-controlled filter with voltage controlled bandwidth
    Patent number: 5103084
    Abstract: Embodiments disclose an adjustable filter (cf voltage-controlled bandwidth) having photoconductors whose resistance is adjusted by variable-intensity radiation source means, with a related feedback loop to compensate for thermal changes.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: April 7, 1992
    Assignee: Unisys Corp.
    Inventors: Bruce H. Williams, Valjean P. Snyder, Patrick S. Grant
  • Exceedance counting integrating photo-diode array
    Patent number: 4679215
    Abstract: The use of a comparator and counter associated, on-chip, with each photo-element of an array. Sensing each photo-element without discharging it and allowing each photo-element to accumulate a charge which is large relative to noise variations. These features result in a photo-detector with large signal-to-noise ratios.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: July 7, 1987
    Assignee: Sperry Corporation
    Inventors: Max E. Nielsen, Joseph H. Labrum, Patrick S. Grant