Patents by Inventor David G. Gold

David G. Gold 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: 4806740
    Abstract: A system for authenticating an object on the basis of a repeatably sensible, random magnetic medium or substance deposited on an object, for example in the form of a document. A magnetic medium printed on the document is sensed for its random characteristic which is reduced to a data format that is recorded on the object, e.g. document. Specifically, the repeatably sensible, random characteristic of the magnetic medium is recorded in a digital format on a magnetic stripe of a document so as to identify or verify the document. Conditioning techniques, as depositing and recording the magnetic characteristic medium and selectively sensing it, accomplish various specific objectives.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: February 21, 1989
    Assignee: Light Signatures, Inc.
    Inventors: David G. Gold, Frank D. Tucker
  • Patent number: 4748679
    Abstract: A system for sensing a characteristic of a document, e.g. translucency, by using radiation from the document at a specific window area. The identified window area is illuminated to provide radiation from the area which is sensed by pixel dissection so that pixels of central location in the window area are weighted for greater significance. The pixel weighting attributes greater significance to the central portion of the defined area thereby increasing the tolerance of the system to misalignment of the window area. The observed characteristic is reduced to signal representations which are compared with registered values as to authenticate the document. Pixel-weighting techniques include overlapped pixels, filtered pixels and algebraically weighted pixels.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: May 31, 1988
    Assignee: Light Signatures, Inc.
    Inventors: David G. Gold, Vahakn K. Gharibian