Patents by Inventor Chin-Shan Ko

Chin-Shan Ko 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).

  • Joint between tubes of a tube combination having annular trenches
    Patent number: 6840702
    Abstract: A tube combination has upper and lower tubes, which are joined together with a coupling, and which have spaced annular trenches on outer sides. Annular projections are formed on the upper end of the lower tube and the lower end of the upper tube; the annular projections are pressed against each other when the tubes are joined together, and are shaped such that they together are in the shape of the annular trenches when the tubes are joined together, making the tube combination look like one having a single tube part.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: January 11, 2005
    Inventor: Chin-Shan Ko
  • Joint between tubes of a tube combination having annular trenches
    Publication number: 20040156674
    Abstract: A tube combination has upper and lower tubes, which are joined together with a coupling, and which have spaced annular trenches on outer sides. Annular projections are formed on the upper end of the lower tube and the lower end of the upper tube; the annular projections are pressed against each other when the tubes are joined together, and are shaped such that they together are in the shape of the annular trenches when the tubes are joined together, making the tube combination look like one having a single tube part.
    Type: Application
    Filed: February 11, 2003
    Publication date: August 12, 2004
    Inventor: Chin-Shan Ko