Patents by Inventor William P. Graff

William P. Graff 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).

  • Patent number: 4799720
    Abstract: In accordance with illustrative embodiments of the present invention, a gate latch apparatus includes a frame having spaced side members, a ring pivotally mounted between the side members, and means to limit outward swinging of the ring. A support rigidly secured with respect to the frame has a horizontal portion and an inclined portion to aid the user in positioning a latch bar on the horizontal portion where operation of the latch is assured. The bar causes the ring to swing inwardly during closure, and the ring drops downward upon passage of the bar to latch the gate closed. To release the latch, the ring is lifted to enable the bar to be removed from the support.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: January 24, 1989
    Inventors: John P. Watson, William P. Graff