Patents by Inventor Mitsuyosi Shoji

Mitsuyosi Shoji 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 recording apparatus comprising a magnetic recording medium and a magnetic head each coated with a coating of a binder and a specified fluorolubricant
    Patent number: 5219651
    Abstract: A magnetic recording medium which comprises a non-magnetic substrate, a thin film magnetic layer formed on the surface of the substrate and an organic thin film protective layer formed on the magnetic layer, the organic thin film protective layer having a thickness of not more than 100 nm and containing a filler having a particle size of not more than 50 nm, wherein the surface of the organic thin film protective layer is further coated with a fluorine-based compound represented by the following general formula:F(C.sub.3 F.sub.6 --I--).sub.x --C.sub.2 F.sub.4 --,F(C.sub.3 F.sub.6 --O--).sub.x --(CF.sub.2 O).sub.y --(CF.sub.2).sub.z --or--(C.sub.2 F.sub.4 --O--).sub.y --(CF.sub.2 --CF.sub.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: June 15, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuyosi Shoji, Takayuki Nakakawaji, Yutaka Ito, Shigeki Komatsuzaki, Fumio Nakano