Patents by Inventor Chuan Ching Chen

Chuan Ching 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).

  • Pneumatic tool
    Patent number: D447029
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: August 28, 2001
    Inventors: Yung Yung Sun, Chuan Ching Chen