Patents by Inventor Tsun W. Yeh

Tsun W. 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).

  • Electronic detection device for detecting the ending of the rewinding of a video cassette rewinder
    Patent number: 5152477
    Abstract: An electronic device for detecting the conclusion of the rewinding cycle of a video cassette rewinder. When the rewinding cycle is completed, a detection circuit and capacitive level sensing circuit device detect this fact by the signal being sent and transistor and amplifiers communicate this signal to a second motor. This second motor activates movement of a link to open the front of the cassette rewinder and to cut off the power supply. The invention includes a temperature control device which disconnects the rewinding motor once its temperature reaches a certain level.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: October 6, 1992
    Inventor: Tsun W. Yeh