Patents by Inventor Derek John Englefield

Derek John Englefield 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).

  • Two-tine hinge
    Patent number: D556011
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: November 27, 2007
    Inventors: Roy Victor Bladen, Derek John Englefield
  • Three-tine hinge
    Patent number: D565386
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: April 1, 2008
    Inventors: Roy Victor Bladen, Derek John Englefield