Patents by Inventor Walter Drobshoff

Walter Drobshoff 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).

  • Digital clock
    Patent number: D262608
    Type: Grant
    Filed: January 25, 1980
    Date of Patent: January 12, 1982
    Inventors: Walter Drobshoff, Ivan H. Hamilton