Patents by Inventor Hitoshi Nobumasa

Hitoshi Nobumasa 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).

  • Oxide superconductor
    Patent number: 5372990
    Abstract: Provided is an oxide superconductor in which superconducting layer is sandwiched between two blocking layers having different compositions. Available superconducting layers include a one-layer system having one Cu-O.sub.2 sheet, a two-layer system having a mediating layer sandwiched between two Cu-O.sub.2 sheets, and a three-layer system having mediating layers sandwiched individually between three Cu-O.sub.2 sheets.Since the blocking layers are of different compositions, seventy-seven kinds of oxide superconductors can be obtained.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: December 13, 1994
    Assignee: Toray Industries, Ltd.
    Inventors: Hitoshi Nobumasa, Kazuharu Shimizu
  • Light-weight composite material
    Patent number: 4770929
    Abstract: A light-weight composite material having a laminated structure comprises at least one porous fiber layer constructed of reinforcing short fibers which are distributed in random directions and combined with each other mainly at intersections thereof by carbonized binder and at least one fiber reinforced plastic layer comprising reinforcing fibers and a matrix resin. The composite material can have a low density, high mechanical properties of strength, modulus of elasticity and rigidity.
    Type: Grant
    Filed: September 2, 1987
    Date of Patent: September 13, 1988
    Assignee: Toray Industries, Inc.
    Inventors: Hitoshi Nobumasa, Kazuharu Shimizu