Patents by Inventor Masamichi Tsuruta

Masamichi Tsuruta 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).

  • Ferromagneticpiezoelectric ceramic composition
    Patent number: 4184971
    Abstract: A piezoelectric ceramic composition which comprises the combination of a pyrochlore composite oxide Ba.sub.2 Sb.sub.2 O.sub.7, and a base ceramic mixture of PbTiO.sub.3 and PbZrO.sub.3.
    Type: Grant
    Filed: August 26, 1977
    Date of Patent: January 22, 1980
    Assignee: TDK Electronic Co.
    Inventors: Yoichi Tanaka, Masamichi Tsuruta, Koji Takahashi, Tsutomu Hasegawa, Makoto Hori
  • Ferromagnetic piezoelectric ceramic composition
    Patent number: 4169803
    Abstract: A piezoelectric ceramic composition which comprises the combination of a pyrochlore composite oxide and a base ceramic mixture of PbTiO.sub.3 and PbZrO.sub.3.
    Type: Grant
    Filed: September 27, 1977
    Date of Patent: October 2, 1979
    Assignee: TDK Electronic Company
    Inventors: Yoichi Tanaka, Masamichi Tsuruta, Koji Takahashi, Tsutomu Hasegawa, Makoto Hori
  • Method of preparing a piezoelectric ceramic composition
    Patent number: 4087366
    Abstract: A piezoelectric ceramic composition which comprises the combination of a pyrochlore composite oxide and a base ceramic mixture of PbTiO.sub.3 and PbZrO.sub.3 is prepared by individually forming pyrochlore composite oxide, PbTiO.sub.3 and PbZrO.sub.3 components; and sintering a mixture of the formed components at a temperature greater than 1,000.degree. C.
    Type: Grant
    Filed: November 30, 1973
    Date of Patent: May 2, 1978
    Assignee: TDK Electronic Company
    Inventors: Yoichi Tanaka, Masamichi Tsuruta, Koji Takahashi, Tsutomu Hasegawa, Makoto Hori