Patents by Inventor David Matthewman

David Matthewman 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).

  • Golf ball
    Patent number: D319483
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: August 27, 1991
    Assignee: Dunlop Limited a British Company
    Inventors: Brian F. Machin, David Matthewman
  • Golf ball
    Patent number: D328321
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: July 28, 1992
    Assignee: Dunlop Limited a British Company
    Inventors: Brian F. Machin, David Matthewman
  • Golf ball
    Patent number: D329675
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: September 22, 1992
    Assignee: Dunlop Limited a British Company
    Inventors: Brian F. Machin, David Matthewman