Patents by Inventor Takashi Yamase

Takashi Yamase 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 medium
    Patent number: 4223361
    Abstract: A magnetic recording medium improved in durability which comprises a substrate and a magnetic layer of about 1.0 to 10.mu. in thickness comprising magnetic particles and a binder and being formed on the substrate, characterized in that the magnetic layer further comprises (a) a liquid hydrocarbon having a melting or flowing point of about -20.degree. to -60.degree. C. with (b) .alpha.-iron oxide particles having a particle size of 0.5 to 2.mu. and/or (c) a higher fatty acid having a melting point of about 45.degree. C. or higher.
    Type: Grant
    Filed: November 16, 1978
    Date of Patent: September 16, 1980
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Hiroshi Zaitsu, Takashi Yamase, Sadao Yamashita, Kunio Mizushima