Patents by Inventor Humitoshi Toyoshima

Humitoshi Toyoshima 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 head having ceramic coupling body
    Patent number: 4769728
    Abstract: A magnetic head comprising a pair of erasing cores, a coupling body coupling the pair of erasing cores together, the coupling body having a groove, and a recording and reproducing core fitted into the groove in the coupling body so as to form an erasing gap on each side of the recording and reproducing core. At least the periphery of the groove is formed by a nonmagnetic material having a glass erosion resistance.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: September 6, 1988
    Assignee: Alps Electric Co, Ltd.
    Inventors: Humitoshi Toyoshima, Shoichi Koyama