Patents by Inventor Chien-Lang Tsai

Chien-Lang Tsai 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).

  • Screw driver handle
    Patent number: D351098
    Type: Grant
    Filed: March 31, 1993
    Date of Patent: October 4, 1994
    Inventor: Chien-Lang Tsai