Patents by Inventor Tadao Ohshima

Tadao Ohshima 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).

  • Optical information reading apparatus
    Patent number: 4818856
    Abstract: Apparatus for reading optical information such as a bar code capable of reflecting ambient light and including a hand-held reader containing an image sensor. The hand-held reader is constructed so that ambient light illuminates the optical information, whereby an image of the optical information is imaged by ambient light reflected from the optical information on the image sensor so that the image is converted into an electric signal. The hand-held reader further includes a light detector for detecting intensity of the ambient light and the image sensor is controlled so that the exposure time thereof is changed in accordance with intensity of the ambient light detected by the light detector.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: April 4, 1989
    Assignee: Nippondenso Co., Ltd.
    Inventors: Takeshi Matsushima, Atsutoshi Okamoto, Hiromitsu Takai, Tadao Ohshima, Mutsushi Yamashita, Hiroshi Yamamoto