Patents by Inventor Shang-Hsieh Chen

Shang-Hsieh Chen 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).

  • Improved trigger-type control switch for D.C. motors
    Patent number: 4878000
    Abstract: An improved triggering switch for DC motors having a base support, a pressing member operatively mounted over the base support, a coupling stand with an open section installed in an upper portion of the base support, a set of motor terminals and power source terminals combined with a contact shaft respectively disposed in the open section of the coupling stand, and a selection button adjustably installed at the base support and movably connected to the contact shaft.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: October 31, 1989
    Inventor: Shang-Hsieh Chen