Patents by Inventor Tsou Hsien Chih

Tsou Hsien Chih 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).

  • Dynamic searching device for toys
    Patent number: 6224454
    Abstract: The present invention provides a dynamic searching device for toys, having at least two optical sensors to sense a target and a control circuit to compare the sensed signals of the two sensors and control a driver to move the toy, thus giving the toy dynamic movement.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: May 1, 2001
    Inventors: Jer-Ming Cheng, Tsou Hsien Chih