Patents by Inventor Chang H. Hwang

Chang H. Hwang 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).

  • Sensor device for mass flow controller
    Patent number: 5373737
    Abstract: A sensor device for a mass flow controller suitable for stably sensing gas flowrate of the mass flow controller regardless of variation of peripheral temperature.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: December 20, 1994
    Assignee: Goldstar Electron Co., Ltd.
    Inventor: Chang H. Hwang