Patents by Inventor Robert E. Messmer

Robert E. Messmer 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).

  • Loose leaf page fastener
    Patent number: 3994606
    Abstract: The present fastener for holding a stack of loose leaf pages has a base piece with easily flexible and resilient plastic prongs and a top piece with openings for passing the prongs and sliders for holding the prongs folded down on the top piece. The prongs are constructed and arranged to flex readily when released from beneath the sliders in the top piece and pages in the top of the stack are folded out. The prongs have shoulders near their outer ends for preventing the complete removal of the top piece.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: November 30, 1976
    Inventor: Robert E. Messmer