Patents by Inventor Hiroshi Fukamizu

Hiroshi Fukamizu 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).

  • Road surface condition detection system
    Patent number: 4690553
    Abstract: Road surface condition detection system comprising light projector means for projecting light including the infrared region of the spectrum to a road surface to sense the condition thereof, the infrared having wavelengths at which the reflectance of snow is smaller than that of the road surface in a dry condition, light receiving means for receiving light reflected from the road surface, comparisons means for comparing the output signals generated from the light receiving means with reference signal levels corresponding to dry, wet, snowy and frozen conditions, and judging means for judging the road surface to be one of the conditions in accordance with results of comparison.
    Type: Grant
    Filed: June 12, 1980
    Date of Patent: September 1, 1987
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Hiroshi Fukamizu, Masaji Nakano, Kunio Iba, Taro Yamasaki, Kenji Sano