Patents by Inventor Douglas H. Graham

Douglas H. Graham 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).

  • Roller skate
    Patent number: D323540
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: January 28, 1992
    Assignee: Rollerblade, Inc.
    Inventor: Douglas H. Graham
  • Ventilated boot
    Patent number: D327360
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: June 30, 1992
    Assignee: Rollerblade, Inc.
    Inventor: Douglas H. Graham
  • Sport boot
    Patent number: D327565
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: July 7, 1992
    Assignee: Rollerblade, Inc.
    Inventor: Douglas H. Graham
  • Long blade roller skate
    Patent number: D334225
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: March 23, 1993
    Assignee: Rollerblade, Inc.
    Inventor: Douglas H. Graham
  • Ribbed brake pad for a roller skate
    Patent number: D357962
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: May 2, 1995
    Assignee: Rollerblade, Inc.
    Inventors: Paul G. Moldenhauer, Douglas H. Graham
  • Ribbed brake pad for a roller skate
    Patent number: D358626
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: May 23, 1995
    Assignee: Rollerblade, Inc.
    Inventors: Paul G. Moldenhauer, Douglas H. Graham