Patents by Inventor Carl Raymond Kolker

Carl Raymond Kolker 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).

  • Methods and apparatus for automatic background and contrast control
    Patent number: 3952144
    Abstract: An automatic background and contrast control unit is used in a facsimile transmitter or receiver unit and operates on the uncorrected video signal representing the shade of source document areas being scanned to produce a corrected output signal which accurately and uniformly represents the full range of black and white and intermediate grey areas of the document. The facsimile transmitter makes a preliminary calibrating scan in which it sequentially scans a known black area and a known white area, and the automatic background and contrast control unit fully automatically stores a first sample of the uncorrected video signal when the known black area is being scanned and stores a second sample of the uncorrected video signal when the known white area is being scanned.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: April 20, 1976
    Assignee: Faxon Communications Corporation
    Inventor: Carl Raymond Kolker