Patents by Inventor Tsau Yong Der

Tsau Yong Der 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).

  • Computer keyboard
    Patent number: D426834
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: June 20, 2000
    Assignee: Behavior Tech Computer Corporation
    Inventor: Tsau Yong Der