Patents by Inventor Yuji Doki

Yuji Doki 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).

  • Patent number: 4585697
    Abstract: A magnetic recording medium is disclosed comprising a substrate coated with a mixture which consists essentially of (1) hexagonal plate-like shaped, ferrite magnetic powder particles having an average particle diameter of 0.2 .mu.m or less and (2) a binder resin having an active hydrogen equivalent of 2000 or more. This magnetic recording medium displays no flocculation of the hexagonal system ferrite magnetic powder, and has excellent dispersion properties and perpendicular orientation ability. Further, smoothness on the coating film is good, and S/N properties are noticeably improved.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: April 29, 1986
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hirohisa Kato, Toshihiko Oguchi, Yuji Doki