Patents by Inventor Hisashi Aizawa

Hisashi Aizawa 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).

  • Flat tablet case with a hinged cap
    Patent number: 6247595
    Abstract: A flat tablet case (A) is assembled by joining together a bottom half case (30) having the shape of a rectangular tray and a top half case (10) having the shape of a rectangular tray. A plurality of studs (21 to 25) are formed on the inner surface of the top half case (10), and a plurality of sockets (41 to 45) are formed on the inner surface the bottom half case (30). A hinged cap (50) is formed integrally with the bottom half case (30) in a section of the side wall (31) excluding corners. The hinged cap (50) is provided on its opposite side surfaces with projections (53, 54) which are engaged with and disengaged from cap holding structures (35, 36) formed on the bottom half case (30).
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: June 19, 2001
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Katsuhiko Omata, Yuji Sugiyama, Mikiko Suzuki, Hisashi Aizawa
  • Flat tablet case with a hinged cap
    Patent number: 5947294
    Abstract: A flat tablet case (A) is assembled by joining together a bottom half case (30) having the shape of a rectangular tray and a top half case (10) having the shape of a rectangular tray. A plurality of studs (21 to 25) are formed on the inner surface of the top half case (10), and a plurality of sockets (41 to 45) are formed on the inner surface the bottom half case (30). A hinged cap (50) is formed integrally with the bottom half case (30) in a section of the side wall (31) excluding corners. The hinged cap (50) is provided on its opposite side surfaces with projections (53, 54) which are engaged with and disengaged from cap holding structures (35, 36) formed on the bottom half case (30).
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: September 7, 1999
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Katsuhiko Omata, Yuji Sugiyama, Mikiko Suzuki, Hisashi Aizawa
  • Lens drive mechanism for optical disc player with parallel support springs having different spring constants
    Patent number: 5467328
    Abstract: A lens drive mechanism for an optical disc player includes a movable unit including an objective lens for focusing a coherent beam of light on an optical disc, a lens holder carrying the objective lens, focusing and tracking coils secured to opposite portions of a periphery of the lens holder. The lens drive mechanism also includes permanent magnets and yokes, and a plurality of support members connected at one end to the periphery of the lens holder and at the opposite end to a support fixture for supporting the movable unit for movement in focusing and tracking directions substantially perpendicular to each other.
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: November 14, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yutaka Murakami, Toru Nakamura, Takao Hayashi, Akira Matsubara, Hisashi Aizawa