Patents by Inventor Tian-Fu Tsau

Tian-Fu Tsau 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 MEMBER HAVING TWO DIFFERENT THREAD ANGLES FORMED ON A SHARP-EDGED THREAD
    Publication number: 20070172333
    Abstract: A screw member comprises a screw shank portion and a thread portion provided thereon. The screw shank portion has a bottom end formed with a tapered section, and a top end formed with a screw head portion. The thread portion is provided on an outer circumference of the screw shank portion. The thread portion includes a first thread section proximate the tapered section, and a second thread section proximate the screw head portion. The first thread section has a first thread angle of a sharp-edged thread smaller than a second thread angle of the second thread section such that the first thread section is easier to cut a rigid material.
    Type: Application
    Filed: June 27, 2006
    Publication date: July 26, 2007
    Inventor: Tian-Fu Tsau