Patents by Inventor Francis F. J. Yu

Francis F. J. Yu 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).

  • Arm swim float
    Patent number: D321742
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: November 19, 1991
    Assignee: Union Plastic Products Ltd.
    Inventor: Francis F. J. Yu
  • Arm swim float
    Patent number: D322302
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: December 10, 1991
    Assignee: Union Plastic Products Ltd.
    Inventor: Francis F. J. Yu