Patents by Inventor Takashi Takahashi

Takashi Takahashi 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).

  • Gas detecting element
    Patent number: 4242303
    Abstract: A gas detecting element having a high gas selectivity which comprises an N-type metal oxide semiconductor, 0.005 to 8% by weight, based on the metal oxide, of at least one noble metal catalyst selected from the group consisting of platinum (Pt), palladium (Pd) and rhodium (Rh) and phosphorus 1.5 to 30 times as much as that of the noble metal or 0.05 to 30 times as much as that of palladium where palladium alone is used as the noble metal catalyst.
    Type: Grant
    Filed: April 25, 1979
    Date of Patent: December 30, 1980
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Takashi Takahashi, Masaki Katsura, Tadao Kaneda, Hideaki Hiraki, Masayuki Shiratori
  • Planetary gear reduction system
    Patent number: 4237750
    Abstract: A planetary gear reduction system, compact in size, high in the ratio of speed reduction and improved in durability as well as easiness for assemblage and adjustment, which essentially comprises planet gear mechanisms disposed in multiple stages and in series within a casing, in which the planet gears individually include a built-in floating intermediate ring member which distributes the load imposed uniformly among the planet gears.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: December 9, 1980
    Inventor: Takashi Takahashi
  • Piezoelectric oxide materials
    Patent number: 4224174
    Abstract: A piezoelectric oxide material having a general formula(1-x)PbTiO.sub.3 -xPb(CO.sub.1/2 W.sub.1/2)O.sub.3where, "x" ranges between 0.01 and 0.20, and 0.5 to 20 atomic % of Pb is replaced by at least one element selected from the group of Ba, Sr and Ca.The piezoelectric oxide material of this composition has a high Curie point, is suitable for use in high frequency regions and can be readily polarized.
    Type: Grant
    Filed: December 29, 1978
    Date of Patent: September 23, 1980
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hideo Okuma, Takashi Takahashi, Yohachi Yamashita, Osamu Furukawa
  • 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