Patents by Inventor Werner Fischer

Werner Fischer 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).

  • Tennis-racket
    Patent number: 4273331
    Abstract: Tennis rackets or the like having cross and longitudinal strings lying in parallel, adjacent planes in which slidably mounted tubes are provided over the strings, and in which the tubes are fastened together at their respective points of intersection.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: June 16, 1981
    Inventor: Werner Fischer
  • Tennis racket and method of making same
    Patent number: 4190249
    Abstract: Tennis rackets and the like which are particularly adapted for transferring angular momentum to a ball, and methods for making such rackets. The rackets have a central strata of cross strings of particular arrangement and two outer strata of main strings which are laterally independent of the cross strings. The strings of the main string strata are provided with sheaths for engagement with the cross strings. The main string strata are further provided with position stabilized holding strings.
    Type: Grant
    Filed: May 5, 1977
    Date of Patent: February 26, 1980
    Inventor: Werner Fischer