Patents by Inventor Cheng S. Yeh

Cheng S. Yeh 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).

  • Spark-producing mechanism for wheel assembly
    Patent number: 5048897
    Abstract: A spark-producing mechanism for wheel assembly comprises a plurality of flints, a fixing ring for the mounting of flints which closely fits to the shaft of the wheel, a grindstone which is inserted in the interior of the wheel. By rotating the wheel, the flints rub against the grindstone to produce sparks.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: September 17, 1991
    Assignee: Lucky Star Enterprise & Co., Ltd.
    Inventor: Cheng S. Yeh