Patents by Inventor Tu C. Chen

Tu C. 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).

  • Screwdriver structure with illuminating function
    Patent number: 4768137
    Abstract: A screwdriver structure with illuminating function wherein a set of battery is disposed into the slot inside the grip handle, a bulb is disposed into the body slot inside the transparent receptacle, and a desired screwdriver is installed in the mouth on said receptacle, so that the bulb can be turned on and off through moving a sliding block in favor of illumination for installing or removing some screws.
    Type: Grant
    Filed: August 4, 1987
    Date of Patent: August 30, 1988
    Inventors: Hong L. Hwaw, Huo M. Chen, Tu C. Chen