Patents by Inventor Norbert B. Donnelly

Norbert B. Donnelly 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).

  • Anti-vibration device for sports rackets
    Patent number: 4600194
    Abstract: A vibration damping device which may be releasably secured to the throat portion of a sports racket. The device employs a clamping member which may be releasably secured to the frame defining the throat portion of the racket, and a damping member fixedly secured to the clamping member in a cantilevered fashion. A first vibration of the head portion of the racket caused by the impact of the game ball with the racket face induces a second vibration in the damping member, resulting in a damping of the first vibration and reduction in the transmission of vibration to the handle of the racket.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: July 15, 1986
    Inventor: Norbert B. Donnelly