Patents by Inventor David G. Stephens

David G. Stephens 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).

  • Ride quality meter
    Patent number: 4413522
    Abstract: The invention is a ride quality meter that automatically transforms vibration and noise measurements into a single number index of passenger discomfort. The noise measurements are converted into a noise discomfort value. The vibrations are converted into single axis discomfort values which are then converted into a combined axis discomfort value. The combined axis discomfort value is corrected for time duration and then summed with the noise discomfort value to obtain a total discomfort value.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: November 8, 1983
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Jack D. Leatherwood, Thomas K. Dempsey, Sherman A. Clevenson, David G. Stephens