Patents by Inventor Tain-Jenn Hu

Tain-Jenn Hu 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).

  • Check device for air activated pressure valve
    Patent number: 5913183
    Abstract: A modified air activated pressure valve is described, together with a method for its manufacture, that has a pressure sensitive switch located in the inlet chamber and in the outlet chamber. These pressure sensitive switches are preset by the user to output a finite voltage (typically about 5 volts) only when they are exposed to a pressure that exceeeds some value. The outputs of both switches may then be displayed, as needed. Additionally, a display circuit is provided that gives an output signal only when both the inlet and the outlet chambers are at or above their intended pressures.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: June 15, 1999
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Tain-Jenn Hu, Jeng-Ding Tseng, Philip J. Lin