Patents by Inventor Frank William Popplewell

Frank William Popplewell 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).

  • Games racquets
    Patent number: 4119313
    Abstract: The invention provides a frame for a games racquet, e.g. a badminton racquet, formed from a plastics material reinforced with a circumferentially-extending tubular metal member. The tubular metal member may be visible in the surface of the product, e.g. running the length of the inner periphery of the head of the frame.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: October 10, 1978
    Assignee: Dunlop Limited
    Inventors: Frank William Popplewell, Frank Raymond Houghton
  • Shuttlecocks
    Patent number: 3993310
    Abstract: A shuttlecock skirt has an array of diverging stems, whose ends are at the convergent end of the skirt, joined together in an end-ring. The outer end of the end-ring is closed to form a member of `U` -- shaped transverse cross-section. This member is provided with a nose-stem, projecting away from the skirt, for anchoring a striking cap. In a preferred embodiment a radial extension, e.g. disc, is attached to the nose-stem and various preferred dimensions for the end-ring are defined.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: November 23, 1976
    Assignee: Dunlop Limited
    Inventor: Frank William Popplewell