Patents by Inventor Gunzi Okawara

Gunzi Okawara 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).

  • Ultrasonic measuring instrument
    Patent number: 4334431
    Abstract: By detecting the instant of a selected zero-crossing of a received ultrasonic signal rather than relying on the instant the amplitude of that received signal exceeds a predetermined reference amplitude in excess of zero, a transit-time measuring instrument can be realized which is free from the measurement errors normally arising from acoustic signal attenuation in the medium through which it passes.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: June 15, 1982
    Assignee: Fuji Electric Company, Ltd.
    Inventors: Masaru Kohno, Yukia Nakagawa, Takeo Kada, Gunzi Okawara