Patents by Inventor Terunobi Ishikawa

Terunobi Ishikawa 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).

  • Semiconductive ceramic composition and semiconductive ceramic device using the same
    Patent number: 5703000
    Abstract: Provided is a semiconductive ceramic composition comprising a lanthanum cobalt oxide and having a negative resistance-temperature characteristic, which contains, as the side component, a chromium oxide in an amount of from about 0.005 to 30 mol % in terms of chromium, and also a semiconductive ceramic device comprising the composition. The device is usable for rush current inhibition, for motor start-up retardation and for halogen lamp protection, and is also usable in temperature-compensated crystal oscillators.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: December 30, 1997
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akinori Nakayama, Terunobi Ishikawa, Hiroshi Takagi, Yukio Sakabe