Patents Assigned to Shunichi Isasaki
  • Magnetic recording and reproducing device
    Patent number: 4251842
    Abstract: A magnetic recording and reproducing device using a double-layered magnetic recording medium having a first layer with an anisotropy perpendicular to the medium plane and having a second layer with a lower coercive force than the first layer. A single pole magnetic head is arranged so as to magnetize the recording medium in a direction perpendicular to the recording medium plane.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: February 17, 1981
    Assignees: Shunichi Isasaki, Sony Corporation, Fujitsu Limited
    Inventors: Shunichi Iwasaki, Yoshihisa Nakamura