Patents by Inventor Jeng-Fa Chen

Jeng-Fa 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).

  • Patent number: D421448
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: March 7, 2000
    Assignee: Hung Sheng Optical Co., Ltd.
    Inventor: Jeng-Fa Chen