Patents by Inventor Chan-Hwei Jang

Chan-Hwei Jang 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).

  • Jazz drumhead
    Patent number: 4616552
    Abstract: A jazz drumhead characterized by comprising a stepped, curved buffer ring formed by compression moulding and set between the central part and circumferential part of the drumhead to make the central part 1-1.2 mm higher than the circumferential part so as to offer a tolerance of the radial tension of the drumhead to prolong its life, facilitate timbre adjusting and minimize noises.
    Type: Grant
    Filed: December 10, 1985
    Date of Patent: October 14, 1986
    Inventor: Chan-Hwei Jang