Patents by Inventor Shiu-Mei Chen

Shiu-Mei 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).

  • Wood screw with square threads
    Patent number: 6644904
    Abstract: A wood screw to be used exclusively for fastening a wooden plate mainly has a screw shank helically disposed with squared threads, wherein a shaft flange is disposed at the bottom end of the screw shank to be parallel or slanted to the longitudinal axis of the screw shank between the upper and the bottom rims of the third and fourth threads. The shaft flange is in a convex trapezoid shape and is positioned vertically along the shank to make a pointed or planar cut so as to reduce friction for a smoother driving, an easier and labor-saving operation.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: November 11, 2003
    Inventors: Shu-Li Chen, Shiu-Mei Chen
  • WOOD SCREW WITH SQUARE THREADS
    Publication number: 20030118423
    Abstract: A screw structure to be used exclusively for fastening a wooden plate mainly has a screw shank helically disposed with squared threads, wherein a shaft flange is disposed at the bottom end of the screw shank to be parallel or slanted to the longitudinal axis of the screw shank between the upper and the bottom rims of the third and fourth threads; the shaft flange is in a convex trapezoid shape and is positioned vertically along the shank to make a pointed or planar cut so as to reduce friction for a smoother driving, an easier and labor-saving operation.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 26, 2003
    Inventors: Shu-Li Chen, Shiu-Mei Chen
  • Screw
    Patent number: D469007
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: January 21, 2003
    Inventors: Shiu-Mei Chen, Shu-Li Chen