Patents by Inventor John A. Handwork

John A. Handwork 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).

  • Patent number: 10536576
    Abstract: A test device for measuring load coils in a network using a pseudorandom binary sequence (PRBS) based technique is disclosed. The test device may comprise a transmitter to transmit a plurality of test signals at a test point in a network. The test device may comprise a receiver to receive a plurality of response signals at the test point. The test device may also comprise a processor to analyze the plurality of response signals and perform at least one load coil measurement. The processor may achieve this by applying a transformation calculation to generate a plurality of terms of the transformation calculation simultaneously, converting the plurality of terms of the transformation calculation into a plurality of impedances, converting the plurality of impedances into polynomials using a conversion technique, analyzing the polynomials for poles and zeros, and estimating at least one load coil measurement based on the poles and zeros of the polynomials.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: January 14, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Gerald Gaboury, John Handwork
  • Publication number: 20200014795
    Abstract: A test device for measuring load coils in a network using a pseudorandom binary sequence (PRBS) based technique is disclosed. The test device may comprise a transmitter to transmit a plurality of test signals at a test point in a network. The test device may comprise a receiver to receive a plurality of response signals at the test point. The test device may also comprise a processor to analyze the plurality of response signals and perform at least one load coil measurement. The processor may achieve this by applying a transformation calculation to generate a plurality of terms of the transformation calculation simultaneously, converting the plurality of terms of the transformation calculation into a plurality of impedances, converting the plurality of impedances into polynomials using a conversion technique, analyzing the polynomials for poles and zeros, and estimating at least one load coil measurement based on the poles and zeros of the polynomials.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 9, 2020
    Applicant: VIAVI SOLUTIONS INC.
    Inventors: Gerald GABOURY, John HANDWORK
  • Patent number: 8437045
    Abstract: Provided are bitmap based trapping methods, apparatus and systems. According to one exemplary method, black trapping color image data is performed by estimating the continuous tone values associated with non-black pixels near a qualified black pixel and subsequently, the estimated continuous tone values are halftoned at the qualified black pixel locations and ORed with the original bitmap data.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: May 7, 2013
    Assignee: Xerox Corporation
    Inventors: Meng Yao, John A. Handwork, Xing Li
  • Publication number: 20110051197
    Abstract: Provided are bitmap based trapping methods, apparatus and systems. According to one exemplary method, black trapping color image data is performed by estimating the continuous tone values associated with non-black pixels near a qualified black pixel and subsequently, the estimated continuous tone values are halftoned at the qualified black pixel locations and ORed with the original bitmap data.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Meng Yao, John A. Handwork, Xing Li