Patents by Inventor Steven F. Watanabe

Steven F. Watanabe 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).

  • Fiber optic sensor
    Patent number: 4787741
    Abstract: There is provided a fiber optic sensor for sensing environmental effects on counterpropagating light beams in an optical loop by comparing the modulation of the light beams in an optical coil exposed to the environmental effects and comparison with a reference fiber shielded from the environmental effects. The counterpropagating light paths contain optical phase modulators for creating nonreciprocal phase shifts and may comprise elongated sections forming a long line array.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: November 29, 1988
    Assignee: McDonnell Douglas Corporation
    Inventors: Eric Udd, Ronald J. Michal, Steven F. Watanabe, John P. Theriault, Richard F. Cahill