Patents by Inventor Chao-Hsin Yu

Chao-Hsin Yu 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: 6428259
    Abstract: A flat headed screw structure includes a screw body having an axle face formed with an axially extended thread, and having a tail end provided with at least one cut groove. The cut groove has a top defining a cut groove opening. The cut groove opening further defines a scrap draining chute toward a center of the screw body. The scrap draining chute extends into the inner portion of the screw body and exceeds the central line of the screw body through a predetermined angle, thereby preventing scraps from blocking the cut groove opening.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: August 6, 2002
    Inventors: Chao-Hsin Yu, Chin-Sun Chen