Patents by Inventor Kenneth L. Seib

Kenneth L. Seib 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: 3944977
    Abstract: A threshold level is automatically varied to follow variations in an input signal reference level. In the disclosed embodiment the reference level is that produced by photodiode-amplifiers in an OCR machine when viewing white or non-character portions of a page, the reference level varying as a function of the change in the length of the optical path during a scan across the page. The threshold level is compared to the input signal level to determine whether a character segment is viewed by the photodiode. Variation of the threshold level is achieved by low pass filtering individual output signals from some of the photodiode-amplifiers and then averaging the filtered signals to provide the adjusted threshold.
    Type: Grant
    Filed: May 21, 1974
    Date of Patent: March 16, 1976
    Assignee: Optical Business Machines
    Inventors: Thomas G. Holmes, Kenneth L. Seib