Patents by Inventor Frederick C. Barrett

Frederick C. Barrett 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).

  • Real time data compression/decompression scheme for facsimile transmission system
    Patent number: 4360840
    Abstract: A graphic image represented by a two-level pel-to-pel definition is compressed by one-dimensional redundancy reduction coding using an entropy preserving algorithm which allows for real time reduction of the pel-to-pel data without any loss in image resolution. The compressed data is concatenated for transmission and then separated and decoded back to a pel-to-pel format for defining a facsimile image.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: November 23, 1982
    Assignee: AM International, Inc.
    Inventors: Larry M. Wolfrum, Frederick C. Barrett