Patents by Inventor Hsing-Theng Chen

Hsing-Theng 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).

  • Method of controlling driving power of double-solenoid electric percussion tools
    Patent number: 5760552
    Abstract: A method of controlling driving power of a double-solenoid electric percussion tool utilizing the change of energizing time of the first solenoid to control the location of a hammer when the first solenoid is switched to the second solenoid so as to increase the driving power of a percussion tool.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: June 2, 1998
    Assignees: Regitar Power Co., Ltd., Chung-Shan Inst. of Science Technology
    Inventors: Hsing-Theng Chen, Jou-Sheng Hu