Patents by Inventor Tsuyoshi Seko

Tsuyoshi Seko 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 composition comprising Ln-Th-Cu-O, wherein Ln is Pr, Nd, Pm, Sm, Eu, Gd, Er or mixtures thereof
    Patent number: 5151409
    Abstract: A superconducting oxide composition comprising Ln-Th-Cu-O wherein Ln indicates at least one element selected from a group consisting of Pr, Nd, Pm, Sm, Eu, Gd and Er. A superconducting structure is formed in such a manner that at least an insulating layer is sandwiched between two superconductor layers but the superconductor layers are electrically coupled with each other, and a superconducting device including the superconducting structure is constructed so as to perform a switching operation for an electric signal, to detect a light signal, and to detect the intensity of a magnetic field. Another superconducting device is formed so that two superconductor layers are put in direct contact with each other, and a tunnel current between the superconductor layers can be controlled.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: September 29, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Hiratani, Shin'ichiro Saitoh, Katsuki Miyauchi, Tsuyoshi Seko