Patents by Inventor David Anthony Wayne Curtis

David Anthony Wayne Curtis 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).

  • Fastener apparatus with self-leveling head
    Patent number: 7850410
    Abstract: Fastener apparatus including a self-adjusting and automatically self-leveling head separate from a threaded shank portion. An embodiment of the apparatus provides a self-leveling head portion defining an annular conical recess and lip portion sized to receive a seal. A threaded shank resides within an annular cup center of the self-leveling head and has a thread-free portion seated by the compressed seal creating a water tight seal.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: December 14, 2010
    Inventor: David Anthony Wayne Curtis