Patents by Inventor Hiroto Nagamine

Hiroto Nagamine 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
    Publication number: 20010012574
    Abstract: A magnetic recording medium of a coated type being formed by coating magnetic paint, which is mixed with and dispersed by a magnetic powder and a resin and an additive, on a substrate, the magnetic powder comprises a magnetite (Fe3O4) powder of which a surface is stuck with powdered carbon black, wherein a sticking amount of the powdered carbon black is within a range of 1 to 20 weight % per the magnetite powder.
    Type: Application
    Filed: January 10, 2001
    Publication date: August 9, 2001
    Applicant: Victor Company of Japan, Ltd.
    Inventors: Yoshiteru Matsubayashi, Hiroto Nagamine
  • Magnetic recording mediums comprising a modified vinyl chloride resin binder in at least a magnetic recording layer
    Patent number: 4868046
    Abstract: Magnetic recording mediums comprise a non-magnetic support and a magnetic recording layer formed on one side of the support. The magnetic recording layer comprises a magnetic powder dispersed in a specific type of vinyl chloride resin having a --SO.sub.3 M or group, in which M represents a monovalent metal or NH.sub.4, and an epoxy group in the molecule. A back coat layer comprising the specific type of vinyl chloride resin may also be formed on the other side of the support.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: September 19, 1989
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Hirokazu Moriizumi, Hiroto Nagamine