Patents by Inventor Dong Lein Chow

Dong Lein Chow 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).

  • Color chart
    Patent number: 5842866
    Abstract: A color chart includes three or more concentric circles having three, six, twelve or more color areas. The second circle includes three areas aligned with and designated by that of the first circle and further includes three areas located between and formed by the three colors of the first circle. The third circle includes six areas of the second circle and further includes six areas located between and formed by the six areas of the second circle. A center includes a black triangle and a white triangle each having three angles directed to three basic colors respectively.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: December 1, 1998
    Inventor: Dong Lein Chow