Patents by Inventor Tai-San Liao

Tai-San Liao 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).

  • Apparatus and a method for measuring the curvature radii of spherical and cylindrical surfaces
    Patent number: 5640778
    Abstract: An apparatus for measuring the curvature radii of spherical and cylindrical surfaces is provided. The apparatus comprises a base, a probe and four ball rings of the same size, wherein the four ball rings are provided on the base and arranged into a square having a side length C. The probe is upward and downward movably mounted on the top surface of the base at the center of the square. There is also provided a method for measuring the curvature radii of spherical and cylindrical surfaces, wherein a ball-ring-distance is equal to C for the cylindrical surface or is equal to .sqroot.2C for the spherical surface.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: June 24, 1997
    Assignee: National Science Council
    Inventors: Shin-Gwo Shiue, Tai-San Liao, Sheng-Tsang Chang, Ching-Fen Kao