Patents by Inventor Chao-Hsiang Kao

Chao-Hsiang Kao 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: 5513454
    Abstract: A sound producing control circuit assembly includes a box covered with a fixed supporting board and fastened to a picture frame at the back to hold a sound producing circuit. A movable conductive board is supported on springs above the fixed supporting board and is urged against the glass of the picture frame to hold down a picture. The fixed supporting board has a first contact metal plate and a second contact metal plate with contact legs spaced above the first contact metal plate for controlling the operation of the sound producing circuit. When the glass is pressed against the movable conductive plate, at least one contact leg of the second contact metal plate is forced to contact the first contact metal plate causing the sound producing circuit to be electrically connected to thereby produce sound.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: May 7, 1996
    Inventors: Chao-Hsiang Kao, Tung-Ying Lee