Patents by Inventor Yoshihiko Azuma

Yoshihiko Azuma 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).

  • Photometer
    Patent number: 4737815
    Abstract: A photometer comprising a measurement button and a FIX key; a photoelectric conversion circuit which is actuated by the measurement button so as to start a measurement; a random-access memory which holds a measured light value, obtained through the measurement by the photoelectric conversion circuit, when the FIX key is operated; an accumulator which calculates deviation of a measured light value obtained through the measurement effected by the photoelectric conversion circuit from the measured light value held by the random-access memory; and a display element by which; (a) when the random-access memory is not holding a measured light value, a measured light value obtained through the measurement effected by the photoelectric conversion circuit is displayed, (b) when the random-access memory is holding a measured light value and the measurement button is out of operation, the measured light value being held is displayed, and (c) when the random-access memory is holding a measured light value and the measurem
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: April 12, 1988
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kazuhiko Naruse, Naoya Takata, Yoshihiko Azuma, Takehiro Katoh