Patents by Inventor Tien-Chien Chang

Tien-Chien Chang 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).

  • Space positioning and directing input system and processing method therefor
    Publication number: 20080018599
    Abstract: A space positioning and directing input system is disclosed. A light source is installed on a space positioning and directing input device to emit the light. First and second image detection devices receive the light and generate first and second imaging pictures. An operation device calculates first and second image positions of the light source based on imaging information of the first and second image pictures and calculates three-dimensional space coordinates of the first and second imaging positions.
    Type: Application
    Filed: July 10, 2007
    Publication date: January 24, 2008
    Inventor: Tien-Chien Chang