Patents by Inventor Yoshiyuki Nakamori

Yoshiyuki Nakamori 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).

  • Shutter assembled disc cartridge
    Patent number: 4959744
    Abstract: A recording disc cartridge comprising a disc case formed by a top half and a bottom half each having a spindle hole and a head insertion hole, a recording medium rotatably enclosed in the disc case, shutter means for closing and opening the spindle holes and the head insertion holes, a slide means for moving the shutter means in both lateral directions relative to a line which passes through each center of the spindle hole and the head insertion hole and means for resiliently exerting the slide means so as to drive the shutter means for closing the spindle holes and the head insertion holes.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: September 25, 1990
    Assignees: Hitachi Maxell, Ltd., Hitachi, Ltd.
    Inventors: Yasunori Kanazawa, Yoshiyuki Nakamori, Tadahiro Kuwa, Nobuyuki Fujimoto, Shinichi Abe
  • Shutter assembled disc cartridge
    Patent number: 4811151
    Abstract: A recording disc cartridge comprising a disc case formed by a top half and a bottom half each having a spindle hole and a head insertion hole, a recording medium rotatably enclosed in the disc case, shutter means for closing and opening the spindle holes and the head insertion holes, a slide means for moving the shutter means in both lateral directions relative to a line which passes through each center of the spindle hole and the head insertion hole and means for resiliently exerting the slide means so as to drive the shutter means for closing the spindle holes and the head insertion holes.
    Type: Grant
    Filed: February 10, 1987
    Date of Patent: March 7, 1989
    Assignees: Hitachi Maxell, Ltd., Hitachi, Ltd.
    Inventors: Yasunori Kanazawa, Yoshiyuki Nakamori, Tadahiro Kuwa, Nobuyuki Fujimoto, Shinichi Abe
  • Disc cartridge
    Patent number: 4740948
    Abstract: A disc cartridge comprising a cartridge case, a magnetic recording disc rotatably mounted in the cartridge case, and head insertion openings formed extending to the side portions of the cartridge case, the openings being opened even at one edge of the cartridge case for facilitating insertion of the head mounted in a recording and play back device, the cartridge case being reinforced by at least one reinforcement member having a smaller diameter or a smaller thickness than the thickness of the cartridge case.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: April 26, 1988
    Assignees: Hitachi Maxwell, Ltd., Hitachi, Ltd.
    Inventors: Yoshiyuki Nakamori, Seiichi Matsushima, Yasunori Kanazawa, Mitsuyoshi Koyama, Shinichi Abe, Nobuyuki Fujimoto