Patents by Inventor Gerhard Riegraf

Gerhard Riegraf 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).

  • Savings bank
    Patent number: 4068797
    Abstract: A savings bank comprising molded upper and lower portions connectable to form a receptacle. The portions include engageable latch elements for securing the portions together so they may be disengaged upon insertion of a key.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: January 17, 1978
    Assignee: Gerhard Riegraf KG
    Inventors: Gerhard Riegraf, Hans Rudolf