Patents Assigned to Humihiko Takei
  • Superconductive oxide crystal and a production process thereof
    Patent number: 4952390
    Abstract: This invention concerns a novel superconductive oxide crystal and a production process thereof, the novel superconductive oxide crystal comprising a superconductive oxide crystal composed of a rare earth element, an alkaline earth meal, copper, and oxygen, in which copper (II) oxide (CuO)) is dispersed like detached islands.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: August 28, 1990
    Assignees: Humihiko Takei, Ibiden Co., Ltd.
    Inventors: Humihiko Takei, Hiroyuki Takeya