Patents by Inventor Tsan-Hsing Wu

Tsan-Hsing Wu 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).

  • Self-tapping screw for fastening a metal corrugated board
    Patent number: 5909992
    Abstract: A self-tapping screw consists of a head and a threaded shank which is provided with a blade, a first threaded portion contiguous to the blade, and a second threaded portion contiguous to the head and greater in length, tooth pitch and tooth depth than the first threaded portion. The self-tapping screw is fastened onto a corrugated board such that the blade and the first threaded portion are securely embedded in a girder, and that the second threaded portion is securely embedded in an insulation layer located between the corrugated board and the girder.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: June 8, 1999
    Inventor: Tsan-Hsing Wu
  • Corrugated metal plate
    Patent number: 5507126
    Abstract: A corrugated metal plate comprises a metal plate provided at two opposite sides thereof with an insertion cap and an insertion seat. Two or more corrugated metal plates are joined together side by side by fastening the insertion cap of one corrugated metal plate with the insertion seat of another corrugated metal plate. The corrugated metal plate is further provided with a predetermined number of ridges located between the insertion seat and the insertion cap.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: April 16, 1996
    Inventor: Tsan-Hsing Wu