Patents by Inventor Neil D. Graves

Neil D. Graves 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).

  • Postage due detection system
    Patent number: 5943432
    Abstract: A coded postal stamp which carries machine readable indicia representative of a minimum postal denomination. The indicia may be in the form of a UPC code, special inks which can be scanned or specially placed numerals which are easily optically read. The method of the invention includes the steps of scanning postal material such as first class letters previously sorted, and detecting the presence of the coded stamp. Postal material having less than a predetermined denominational amount are rejected.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: August 24, 1999
    Inventors: Jack R. Gilmore, Neil D. Graves