Patents by Inventor Ayumu Midorikawa

Ayumu Midorikawa 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).

  • Patent number: 5424790
    Abstract: A projection apparatus comprising a holding section for holding a film cassette having an exposed magnetic-zoned film therein, motors for automatically drawing out the leader portion of the film from the film cassette and for forwardly feeding the film with a predetermined timing, a projection lamp and a projection lens pair for illuminating the film to project an image, a magnetic head for detecting magnetic information on the film, a shutter which operates in accordance with the magnetic information detected by the magnetic head, and a control circuit for operating the motors and the shutter in accordance with programs, thereby controlling the film feed timing and shutter operation timing.
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: June 13, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Katsuhiko Tsunefuji, Ayumu Midorikawa
  • Patent number: 5335029
    Abstract: In a magnetic recording apparatus for a camera using a film having a magnetic recording portion, a magnetic recording device records photographic data on the magnetic recording portion while the film is wound after a photographic operation corresponding to one frame is completed. An electrically erasable nonvolatile storage device stores the photographic data after the photographic operation corresponding to one frame is completed. A magnetic reproducing device reproduces the photographic data recorded on the magnetic recording portion while the film is rewound. A determining device determines whether the photographic data reproduced by the magnetic reproducing device coincides with the photographic data stored in the storage device. When the determining device determines that the two photographic data do not coincide with each other, a re-recording device causes the magnetic recording device to re-record the photographic data stored in the storage device on the magnetic recording portion.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: August 2, 1994
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Junichi Itoh, Masahiro Dai, Yasushi Toizumi, Kazunori Mizokami, Yoji Watanabe, Ayumu Midorikawa