Patents by Inventor Hideyasu Aoki

Hideyasu Aoki 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).

  • Method and apparatus for concentration measurement by the quantity, diameter and convergent of a transmitted light beam
    Patent number: 5068542
    Abstract: A concentration measuring method and an apparatus measures the concentration of an objective solvent in a mixed solution by flowing a mixed solution through a tube, transmitting light through the mixed solution as it flows through the tubing and measuring the quantity of light transmitted through the fluid. The concentration of the objective solvent in the mixed solution is measured on the basis of either the quantity of light transmitted, the diameter of a light beam received, or a point of convergence of the light transmitted through the mixed solution. These factors being dependent on the concentration of the objective solvent in the mixed solution.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: November 26, 1991
    Assignee: NGK Spark Plug Company, Ltd.
    Inventors: Minato Ando, Takashi Kato, Hideyasu Aoki, Yasuyuki Mizushima, Tsunetoshi Okura, Akemi Kurokawa