Patents by Inventor Du C. Duong

Du C. Duong 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).

  • Joypad controller
    Patent number: D347864
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: June 14, 1994
    Assignee: Freetron (HK) Co.
    Inventor: Du C. Duong