Patents by Inventor Yu-Yuan Hsueh

Yu-Yuan Hsueh 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).

  • Safety protection AC mains power socket
    Patent number: 5542852
    Abstract: The invention herein relates to a kind of safety protection AC mains power socket that mainly consists an additional AC mains power socket in a recessed section at the rear end of an AC mains power plug which provides a kind of AC mains power plug that accommodates the insertion of a second AC mains power plug while the invention herein is plugged into a wall-type AC mains power socket. Furthermore, invention herein has a cover plate for the recessed section that effectively enhances safe usage by preventing the entry of objects and dust when the additional AC mains power socket of the invention herein is not being utilized.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: August 6, 1996
    Inventor: Yu-Yuan Hsueh