Patents by Inventor Hugh G. Campbell

Hugh G. Campbell 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).

  • Interlock crib
    Patent number: D264003
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: April 20, 1982
    Inventor: Hugh G. Campbell
  • Interlock crib
    Patent number: D264383
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: May 11, 1982
    Inventor: Hugh G. Campbell