Patents by Inventor Yie-Ming Chen

Yie-Ming Chen 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).

  • Passive acoustic traffic monitoring system
    Patent number: 5878367
    Abstract: Traffic is monitored in individual lanes of a roadway as to vehicle count or presence, speed and direction of movement by mounting a microphone array high above the road surface, digitizing the output signals of the microphones, filtering, beamforming and storing the digitized signals to provide separate power histories for separate locations in individual lanes. These power histories are then analyzed to provide vehicle movement data for each lane.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: March 2, 1999
    Assignee: Northrop Grumman Corporation
    Inventors: Gregory Reid Lee, Yie-Ming Chen