Patents by Inventor Tetshuhiko Takahashi

Tetshuhiko Takahashi 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).

  • Photo-sensor and method for operating the same
    Patent number: 5196702
    Abstract: An optically reading type photo-sensor for reading out an information signal of a signal light with a signal reading light includes a first photoconductor (101) and a second photoconductor (102) interposed between two electrodes (104 and 105); an intermediate region (103) disposed between those two photoconductors for storing and recombining carriers; and an optical source (107) for emitting a signal reading light for uninformalizing the potential in said second photoconductor (102), whereby a successive signal reading can be accomplished without any special preparations for the incidence of the signal light. The photo-sensor can be applied to a variety of imaging devices.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: March 23, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Kazutaka Tsuji, Tadaaki Hirai, Yukio Takasaki, Haruo Itoh, Tetshuhiko Takahashi, Kenichi Okajima