Patents by Inventor Keita Okawa

Keita Okawa 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).

  • Vibration measuring instrument
    Patent number: 5728952
    Abstract: The precision of phase difference obtained by a phase difference calculating unit is improved by correction through outputs of a frequency ratio calculating unit and a temperature calculating unit considering that the phase or time difference of each output signal of a vibration sensor indicating the mass flow or density of a fluid is a function of the temperature and axial force on a measurement pipe, or that the axial force is a function of the ratio between two resonant frequencies.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: March 17, 1998
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Hironobu Yao, Hiroyuki Yoshimura, Masato Takahashi, Michihiko Tsuruoka, Iwao Matsumoto, Masakazu Kawakami, Keita Okawa