Patents by Inventor Joseph G. Duthie

Joseph G. Duthie 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 system with an optically addressable plane of optically bistable material elements
    Patent number: 4891790
    Abstract: This device is an all-optical digital architecture for carrying out compuions. Residue number system addition and multiplication tables are produced on an optically-addressable plane composed of optically bistable material. The plane of optically bistable material devices represents a residue number system addition or multiplication tables and is addressed by two intersecting signal beams from the top and a bias beam from the bottom. A combination of two signal beams exceeds the material transmission threshold in the intersection region letting bias light emerge as a position encoded signal beam.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: January 2, 1990
    Assignee: United States of America as represented by the Secretary of the Army
    Inventors: Lee O. Webster, Larry Z. Kennedy, Joseph G. Duthie