Patents by Inventor Donald M. Hanes

Donald M. Hanes 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).

  • Sharpener for rotary electric razor
    Patent number: 3932967
    Abstract: A rotary action electric razor which has a blade with heads rotating in an annular, slotted comb, is sharpened by inserting between the blade heads and comb a flat, annular, flexible disc having a sharpening abrasive surface and having a tab extending generally normal to the plane of the disc and away from the slots in the comb.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: January 20, 1976
    Inventor: Donald M. Hanes