Patents by Inventor Shigeyoshi Imakoshi, deceased

Shigeyoshi Imakoshi, deceased 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).

  • Magnetic transducer head utilizing magnetoresistance effect
    Patent number: 4896235
    Abstract: A MR magnetic head with a sensing element which comprises a plurality of superposed magnetic layers which have a magnetoresistance effect in at least one and a nonmagnetic intermediate layer sandwiched between the magnetic layers, and a sensing current is fed so as to flow in the sensing element in the same direction as a signal magnetic field which is applied to the element. Each of the magnetic layers is formed so as to have an easy axis of magnetization which is substantially perpendicular to the signal magnetic field or to have an isotropic magnetic characteristic in the magnetic film plane, which eliminates Barkhausen noise.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: January 23, 1990
    Assignee: Sony Corporation
    Inventors: Hiroshi Takino, Shigeyoshi Imakoshi, deceased, Nobuhiro Terada, Norio Saito, Hideo Suyama, Kenichiro Tsunewaki