Patents by Inventor Nguyen Phu Nguyen

Nguyen Phu Nguyen 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).

  • Time based low tire pressure warning sensor
    Patent number: 5783992
    Abstract: A battery powered sensor in a tire has a microprocessor and a transmitter circuit permanently connected to a battery and a pressure switch or pressure sensor coupled to the microprocessor. The microprocessor has a sleep state and wakes up every few minutes to execute an algorithm which determines on a time basis whether to read the pressure state and transmit a report of significant changes, and determines on a randomly timed basis whether to transmit a status report. A factory test state permits only one signal transmission when the tire is inflated and inhibits other signals for a period to allow testing of many tires without interference from one another.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: July 21, 1998
    Assignee: Delco Electronics Corp.
    Inventors: Todd D. Eberwine, Victor Mendez, Nguyen Phu Nguyen