Patents by Inventor David Friedwald

David Friedwald 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).

  • Fastening system for interconnecting sheets of plastic materials including glass
    Patent number: 4707894
    Abstract: Sheets of plastic materials including glass are interconnected along a longitudinal outer dimension thereof by an elongated longitudinal female interconnecting member having an upstanding base with transverse legs extending on opposite sides thereof and a central longitudinal socket therein having an open top with a downwardly extending prong receptacle which extends longitudinally the entire length of the socket. The female interconnecting member is adapted to mate with a male interconnecting member having an upstanding longitudinal housing with transverse support members extending from opposite sides thereof and having a downwardly extending bayonet prong centrally located in and integral with the housing extending longitudinally the length of the housing.
    Type: Grant
    Filed: January 14, 1987
    Date of Patent: November 24, 1987
    Assignee: Polycast Technology Corporation
    Inventor: David Friedwald