Patents by Inventor Hachiro Saito

Hachiro Saito 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).

  • Optical card with a built-in IC module technical field
    Patent number: 5932866
    Abstract: An optical card (100) with a built-in IC module comprises a base card (101), an optical recording part (11) incorporated into the base card (101), and an IC module (120) mounted on the base card (101). The IC module (120) has a base (122), an IC chip unit (121) mounted on one of the surfaces of the base (122), and a terminal part (123) formed on the other surface of the base (122). The terminal part (123) is disposed in a region corresponding to the optical recording part (110) so as to be exposed to view. The IC chip unit (121) is disposed outside the region corresponding to the optical recording part (110).
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: August 3, 1999
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Yosuke Terada, Shigeo Hachiki, Hachiro Saito, Seiichi Nishikawa, Yoshihiro Azuma
  • Optical recording medium
    Patent number: 5698284
    Abstract: The present invention relates to an optical recording medium which has excellent scratch resistance and resistance to cracking derived from warpage and bending. It comprises a card substrate; and, laminated on the card substrate, an optical recording member comprising a laminate of a transparent protective layer and an optical recording material layer, wherein a specific surface hard layer is provided on the transparent protective layer.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: December 16, 1997
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Takeshi Kubota, Hachiro Saito, Seiichi Nishikawa, Tetsuo Komori
  • Magnetic recording powder having a high coercive force at room temperatures and a low curie point
    Patent number: 5211770
    Abstract: A magnetic recording powder for use as a material for magnetic recording media including magnetic tapes and magnetic cards, the powder having a high coercive force at room temperatures and a low Curie point, consists of at least one element selected from the group consisting of Y and rare-earth elements (R): 5-20 atomic %, B: 5-20 atomic %, Mn: 4-20 atomic %; and Fe and inevitable impurities: the balance. If required, the powder may further contain Al: 1-10 atomic %, and/or Cr: 1-10 atomic %. The powder has a mean particle size of 0.5-2 .mu.m and a mean crystal grain size of 0.1-0.4 .mu.m.
    Type: Grant
    Filed: July 29, 1992
    Date of Patent: May 18, 1993
    Assignees: Mitsubishi Materials Corporation, Nippon Telegraph and Telephone Corporation, Dai Nippon Insatsu Kabushiki Kaisha
    Inventors: Ginya Ishiguro, Kouichi Ishiyama, Yoshinari Ishii, Takuo Takeshita, Hachiro Saito, Yasuaki Yoshioka
  • Foam-containing slurry to make porous, inorganic construction material
    Patent number: 3963507
    Abstract: Foam-containing slurry for making porous, inorganic construction material composed of 100 parts by weight of water [I], 35 to 350 parts by weight of hydraulic substance [II], and 0.02 to 1.20 parts of foaming agent [III], the foaming agent [III] comprising (1) as the foaming component, 0.05 to 20 parts by weight of water-soluble, low-viscosity cellulose derivatives, (2) as the foam stabilizer, 1 part by weight of water-soluble, high-viscosity cellulose derivatives, and (3) as the foaming accelerator, at least 1 part by weight of at least 75% saponified polyvinyl alcohol.
    Type: Grant
    Filed: May 22, 1974
    Date of Patent: June 15, 1976
    Assignee: Teijin Limited
    Inventors: Naoya Kuramoto, Hachiro Saito, Wataru Yamamoto