Patents by Inventor Sai-Hoi Tsao

Sai-Hoi Tsao 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).

  • Versatile switching module
    Patent number: 5689399
    Abstract: A versatile switching module to control the switching operation of multiple relay switches and to monitor the status of each relay includes a driving card and multiple relay cards, each relay card in turn including a number of relays, with each relay representing a testing channel made up of three testing terminals. In one embodiment, one driver card may be used to control four relay cards, each relay card having sixteen relays and each relay having four single-pole double-throw switches.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: November 18, 1997
    Assignee: Industrial Technology Research Institute
    Inventors: Sai Hoi Tsao, Forest Shih-Sen Chien
  • Automatic self-calibration system for digital teraohmmeter
    Patent number: 5621329
    Abstract: An automatic self-calibration system for digital teraohmmeter wherein a built-in standard resistor is provided. The system is able to calibrate the values of the key components by taking the standard resistor as reference. The calibration procedure of the invention is controlled by a computer and executed automatically. The system is used to measure high-resistance standards up to 10.sup.15 .OMEGA. where the standard uncertainty does not exceed 100 ppm after a traceable calibration.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: April 15, 1997
    Assignee: Industrial Technology Research Institute
    Inventors: Sai-Hoi Tsao, Chun-Chun Chen, Yu-Chuang Lin