Patents by Inventor Nobuyuki Usui

Nobuyuki Usui 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).

  • Disk cartridge
    Patent number: 6961952
    Abstract: A disk cartridge having a small size and a sufficient portability. The disk cartridge has a size of 58 mm (L1)×54 mm (L2)×4 mm (L3), a thickness less than 5 mm and a small area less than a square of 65 mm. The disk cartridge has a notch 10 formed on the insertion side and having a width of 2 mm (L6) and a length of 27.5 mm (i.e., a taper portion of 6 mm (L4)+a straight portion of 21.5 mm (L5)).
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: November 1, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Nobuyuki Takamori, Toshiyuki Tanaka, Mitsunobu Yoshida, Nobuyuki Usui, Tomoyuki Miyake, Toshiharu Inui, Hideharu Tajima, Akira Takahashi, Toshihiro Tamura
  • Disc cartridge and disc apparatus
    Patent number: 6762990
    Abstract: A disc cartridge includes at least a magneto-optical disc and a cartridge (upper shell) storing the magneto-optical disc in a rotatable manner and having an opening provided in a region including a position corresponding to a predetermined rotation center of the magneto-optical disc. The opening is longer on a forward side in the disc cartridge insertion direction (on the Y-direction side) with respect to the position corresponding to the rotation center than on a backward side in the disc cartridge insertion direction (on the X-direction side) along a straight line passing through the position corresponding to the rotation center and parallel to the disc cartridge insertion direction. Thus, a disc cartridge and a disc unit which are constructed to allow the disc cartridge to be smoothly loaded are provided.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: July 13, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsunobu Yoshida, Toshiyuki Tanaka, Nobuyuki Usui
  • Disc cartridge and disc apparatus
    Publication number: 20010004305
    Abstract: A disc cartridge includes at least a magneto-optical disc and a cartridge (upper shell) storing the magneto-optical disc in a rotatable manner and having an opening provided in a region including a position corresponding to a predetermined rotation center of the magneto-optical disc. The opening is longer on a forward side in the disc cartridge insertion direction (on the Y-direction side) with respect to the position corresponding to the rotation center than on a backward side in the disc cartridge insertion direction (on the X-direction side) along a straight line passing through the position corresponding to the rotation center and parallel to the disc cartridge insertion direction. Thus, a disc cartridge and a disc unit which are constructed to allow the disc cartridge to be smoothly loaded are provided.
    Type: Application
    Filed: December 20, 2000
    Publication date: June 21, 2001
    Inventors: Mitsunobu Yoshida, Toshiyuki Tanaka, Nobuyuki Usui