Patents by Inventor Kiyohiko Kawaguchi

Kiyohiko Kawaguchi 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).

  • Measuring particle size distribution
    Patent number: 4288162
    Abstract: A method and apparatus for determining the particle size distribution of particles in a mass of a granular substance. The particles are caused to fall in a stream of separate particles past an irradiated screen, and an instantaneous television picture is taken of the particles and the projected images of the particles are used to measure the projected areas of the particles. Using these areas assuming the average shape of the particles to be substantially a rotational ellipsoid and using a coefficient according to the average configuration of the particles, the particle sizes and their distribution in the mass of particles are calculated.
    Type: Grant
    Filed: February 27, 1979
    Date of Patent: September 8, 1981
    Assignee: Sumitomo Kinzoku Kogyo Kabushiki Kaisha
    Inventors: Yoshiyasu Sakamoto, Yoichi Tamura, Kiyohiko Kawaguchi, Kiyotaka Inada