Patents Assigned to Masayoshi Takei
  • Gas leak-detecting apparatus
    Patent number: 4170770
    Abstract: A gas leak-detecting apparatus which comprises an alarm circuit; a gas-detecting circuit electrically separated from the alarm circuit and provided with a gas-sensitive element prepared from an oxide semiconductor; and a contactless coupling circuit for operating the alarm circuit by an output from the gas-detecting circuit.
    Type: Grant
    Filed: October 5, 1977
    Date of Patent: October 9, 1979
    Assignees: Tokyo Shibaura Electric Co., Ltd., Masayoshi Takei
    Inventors: Noboru Ichinose, Hideo Ohkuma, Takashi Takahashi, Masayoshi Takei