Patents by Inventor Chia-Fa Yang

Chia-Fa Yang 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).

  • Toy double club with whistles
    Patent number: 5306193
    Abstract: A toy double club with whistle including two elongate tubular bodies connected with a chain, each tubular body having a whistle in its inner cavity to move back and forth in a limited distance, the distance being by two opposing projections on the inner surface of the tubular body. A coil spring is placed between the whistle and an outer end of each of the tubular bodies so that the whistle gives out whistling sounds when moved back and forth by the swinging movement of the tubular bodies.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: April 26, 1994
    Inventor: Chia-Fa Yang