Patents by Inventor Spencer N. Shaps

Spencer N. Shaps 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).

  • Adjustable tennis racquet
    Patent number: 4061333
    Abstract: A tension device on a tennis racquet which when activated can adjust the tension of the strung area after the tennis racquet has been completely strung. This new invention consists of movable sidewalls attached to the fixed frame of a tennis racquet, to which the strings are attached. Thus when the movable sidewall with strings attached is activated the tension of the strung area is adjusted.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: December 6, 1977
    Inventor: Spencer N. Shaps