Patents by Inventor Ray Hilbert

Ray Hilbert 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).

  • Apparatus and method for counting the number of shaves for which a razor blade is used
    Patent number: 4268958
    Abstract: A shaving implement is provided with a plurality of frangible tabs that can be broken off, one at a time, incident to each use of a razor blade for shaving. The user is able to keep track of the extent to which each blade is used, and to discard the blade after an appropriate number of uses.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: May 26, 1981
    Inventor: Ray Hilbert