Patents by Inventor Chan Hai Wei

Chan Hai Wei 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).

  • Portable pH detector
    Publication number: 20040132204
    Abstract: A portable pH detector. A pH-ISFET is immersed into a solution, and the gate voltage of the pH-ISFET is detected by a signal detection unit. The level of the detected voltage is adjusted by a gain control and level shift unit and is converted by an A/D converter circuit and then output to a 8051 microcontroller to compute the pH of the solution, with the computed result displayed on a LCD.
    Type: Application
    Filed: January 3, 2003
    Publication date: July 8, 2004
    Inventors: Jung-Chuan Chou, Lan Pin Liao, Chan Hai Wei