Patents by Inventor Choushiro Kitazawa

Choushiro Kitazawa 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).

  • Superconducting wire and method of manufacturing the same
    Patent number: 5935912
    Abstract: A superconducting oxide wire and a method of manufacturing the same are disclosed. The wire comprises a pipe made of a metal and a superconducting oxide material filling the interior of the pipe and comprising superconducting oxide grains which are bonded to each other and which have a perovskite crystal structure having a C face and a C axis. The superconducting oxide grains contain more than 50 vol % of plate-shaped grains of which the length in the direction of the C face is greater than the length in the direction of the C axis. The C faces of most the plate-shaped grains are arranged to be directed toward longitudinal axis of the pipe.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: August 10, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Ken Takahashi, Yukio Takeda, Takeo Yamazaki, Tadahiko Miyoshi, Atsuko Soeta, Kunihiro Maeda, Takaaki Suzuki, Kie Nakamura, Choushiro Kitazawa, Masatoshi Nakazawa
  • Superconducting wire and method of manufacturing the same
    Patent number: 5093314
    Abstract: A superconducting oxide wire and a method of manufacturing the same are disclosed. The wire comprises a pipe made of a metal and a superconducting oxide material filling the interior of the pipe and comprising superconducting oxide grains which are bonded to each other and which have a perovskite crystal structure having a C face and a C axis. The superconducting oxide grains contain more than 50 vol % of plate-shaped grains of which the length in the direction of the C face is greater than the length in the direction of the C axis. The C faces of most the plate-shaped grains are arranged to be directed toward longitudinal axis of the pipe.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: March 3, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Ken Takahashi, Yukio Takeda, Takeo Yamazaki, Tadahiko Miyoshi, Atsuko Soeta, Kunihiro Maeda, Takaaki Suzuki, Kie Nakamura, Choushiro Kitazawa, Masatoshi Nakazawa