Patents by Inventor Mitsuo Igami

Mitsuo Igami 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).

  • Simplified apparatus and method for measuring quantity of ultraviolet radiation received
    Patent number: 5075557
    Abstract: A simplified apparatus for measurement of receipt light quantity of ultraviolet radiation wherein a colored material is carried on a solid support which material discolors or fades in accordance with the receipt of light quantity due to light receipt of ultraviolet radiation having wavelength in the range of at least 300 to 360 nm, and a method for measurement of ultraviolet radiation having wavelength in the range of at least 300 to 360 nm in sunlight which comprises exposing the above measurement apparatus to sunlight and monitoring discoloration or fading of the colored material of the measurement apparatus to detect receipt light quantity of ultraviolet radiation of the wavelengths.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: December 24, 1991
    Assignee: Nippon Carbide Kogyo Kabushiki Kaisha
    Inventors: Isamu Harasawa, Yoshihisa Suzuki, Mitsuo Igami