Patents by Inventor Shinichiro Otaka

Shinichiro Otaka 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 disk substrate
    Patent number: 5360677
    Abstract: A magnetic disk substrate having a composition wherein (V/13)+(Fe/20)+(Cr/17)+(Ni/31)+(Co/23) are no greater than 0.010%, Rem+Si+B+W are no greater than 0.015% (where Rem denotes rare earth metals), 0+2N+0.75C are no less than 0.03% and no greater than 0.5%, and the remainder consists substantially of Ti, all % being weight %.
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: November 1, 1994
    Assignee: NKK Corporation
    Inventors: Hideaki Fukai, Hiroyoshi Suenaga, Kuninori Minakawa, Shinichiro Otaka, Masahiko Naoe