Patents by Inventor Teruhiko Ojima

Teruhiko Ojima 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).

  • Saturable core consisting of a thin strip of amorphous magnetic alloy and a method for manufacturing the same
    Patent number: 4558297
    Abstract: The present invention relates to a saturable core which consists of a coiled thin strip of an amorphous magnetic alloy. The present invention provides a saturable core having a high .DELTA.Bs, a low power loss, a good saturation property, and low secular changes of the magnetic properties, due to determining the coiling direction of the saturable core so that it is the same as that of a coil heat treated.
    Type: Grant
    Filed: October 4, 1983
    Date of Patent: December 10, 1985
    Assignee: TDK Corporation
    Inventors: Masao Shigeta, Teruhiko Ojima
  • R.sub.2 Co.sub.17 Rare type-earth-cobalt, permanent magnet material and process for producing the same
    Patent number: 4213803
    Abstract: Disclosed is the addition of at least two elements of Nb, V, Ta and Zr to the ternary alloy of R (rare earth)-Co-Cu for permanent magnet materials, to thereby provide the permanent magnets with increased coercive force, residual magnetization and energy product. The additional elements enable employment of such Cu and Fe contents of the alloy as less than 10% and more than 6%, respectively. These percentages were avoided in the prior art to prevent the reduction of Br and Hc, respectively.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: July 22, 1980
    Assignee: TDK Electronics Company Limited
    Inventors: Tetsuhito Yoneyama, Shiro Tomizawa, Tetsuo Hori, Teruhiko Ojima
  • Permanent magnet material and process for producing the same
    Patent number: 4210471
    Abstract: Disclosed is the addition of Nb, V, Ta or Zr to the ternary alloy of R (rare earth)-Co-Cu for permanent magnet materials, to thereby provide the permanent magnets with increased coercive force, residual magnetization and energy product. The additional elements enables employment of such Cu and Fe contents of the alloy as less than 10% and more than 6%, respectively. These percentages were avoided in the prior art to prevent the reduction of Br and Hc, respectively.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: July 1, 1980
    Assignee: TDK Electronics, Co., Ltd.
    Inventors: Tetsuhito Yoneyama, Tetsuo Hori, Teruhiko Ojima