Patents by Inventor David N. Haddock

David N. Haddock 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: D396555
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: August 4, 1998
    Inventors: Melvin C. Parker, David N. Haddock
  • Patent number: D407899
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: April 13, 1999
    Inventors: Susan Oakes, David N. Haddock
  • Patent number: D420796
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: February 22, 2000
    Inventors: David N. Haddock, Susan Oakes