Patents by Inventor William B. Wiegman

William B. Wiegman 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).

  • Optical reader fluorescence control
    Patent number: 3946203
    Abstract: A method and system for improving the signal-to-noise ratio in an automatic electro-optical reader of bar codes, wherein fluorescent ink bars arranged in coded configurations on a document are excited by a narrow band of visible radiation in the blue region of the electromagnetic spectrum, and an adjacent but not overlapping visible red region of the spectrum emanating from the ink bars is optically focused onto a light sensitive detector.
    Type: Grant
    Filed: June 26, 1974
    Date of Patent: March 23, 1976
    Assignee: Recognition Equipment Incorporated
    Inventors: Richard M. Hecht, William B. Wiegman