Patents by Inventor Henry Didier

Henry Didier 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).

  • Racquet for ball games
    Patent number: 5240247
    Abstract: A racquet for ball games, and in particular, a tennis racquet, includes a grip (2) and a head with a striking surface, in which the head is arranged to rotate to a limited degree in relation to the grip (2) about the longitudinal axis (7) of the grip (2). Spring and damping elements are fitted between the grip (2) and the head, and specifically, spring elements (13) and damping elements (14) are arranged in axially spaced pairs in the direction of the longitudinal axis (7) in each of a plurality of recesses (12) extending in the direction of the longitudinal axis (7) of the grip (2, 10) between the grip (2) and the shaft (5, 6) of the head in order to enable effective spring and damping of the torsional and longitudinal vibrations of the racquet (1) in the grip region.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: August 31, 1993
    Assignee: Head Sport Aktiengesellschaft
    Inventor: Henry Didier