Patents by Inventor Kuo-Nan Tzeng

Kuo-Nan Tzeng 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).

  • Patent number: 4512575
    Abstract: A racquet for use in playing tennis and other ball and racquet games has a stringing pattern which comprises a pair of longitudinal central strings (5') located symmetrically one on each side of the central longitudinal axis of the racquet frame, and four additional strings disposed outwardly of each of the central strings. The stringing pattern also comprises a pair of transverse strings (5") located symmetrically one on each side of the central transverse axis at a distance of approximately 40% of the length (L) of the strung surface as measured from the inner edge of the racquet throat (3). Also, both in directions toward the tip of the racquet frame (6) and toward the throat (3) four additional strings are arranged. Additional longitudinal and transverse strings are provided that are arranged outwardly from the aforementioned strings.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: April 23, 1985
    Inventor: Kuo-Nan Tzeng