Patents by Inventor Douglas Hood Grambush

Douglas Hood Grambush 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).

  • Control lever knob
    Patent number: D248272
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: June 27, 1978
    Assignee: Deere & Company
    Inventor: Douglas Hood Grambush
  • Telephone entry system housing
    Patent number: D561733
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: February 12, 2008
    Assignee: The Chamberlain Group, Inc.
    Inventors: William Joseph Lord Reeves, Gregory Allen Langley, Jared Harvey Dean, Douglas Hood Grambush