Patents by Inventor William Kupfer

William Kupfer 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).

  • Double-coded wrenches and sockets
    Patent number: 5079978
    Abstract: A novel combination of two sets of wrenches and sockets, each identifiable for size, with each set calibrated according to a different measuring system and both housed in a common container, and a novel process for identifying said size and said measuring systems by indicia specific to each size and to each system of measurement.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: January 14, 1992
    Inventor: William Kupfer