Patents by Inventor Kazuo Yamaba

Kazuo Yamaba 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).

  • Color sensor
    Patent number: 4834541
    Abstract: A color sensor makes a color distinction based on outputs from three primary optical sensing devices for receiving light having three primary colors under a fluorescent lamp by calculating a relative composition ratio of the three primary colors in an integrator. The operation of the integrator is controlled by a pulse generated by detecting a peak value of the light based on an output from a complementary optical sensing device sensitive to visible light.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: May 30, 1989
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventor: Kazuo Yamaba
  • Device for color distinction
    Patent number: 4776702
    Abstract: A half mirror and two dichroic mirrors having different characteristics are provided on an optical path of measurement light from an object, and four sensing devices are provided on optical paths of reflected or transmitted light from these mirrors. Calculations are performed on the outputs of the four sensing devices, and the resultant values are compared with parameters stored in a microcomputer to thereby effect color distinction.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: October 11, 1988
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventor: Kazuo Yamaba