Patents by Inventor Thiann R. Yu

Thiann R. Yu 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).

  • Security system
    Patent number: 5103206
    Abstract: A security system including a plurality of alarm equipped security units usable at discrete locations and operated by individual power sources at those discrete locations. The units are interconnected and alarm linked with one another with the system being set up such that disruption of the interconnection between units at any location in the system causes alarm operation at all of the alarm linked security units.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: April 7, 1992
    Inventor: Thiann R. Yu