Patents by Inventor Syuji Kiji

Syuji Kiji 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).

  • Hardened center pin contract area on magnetic disk cartridge
    Patent number: 5053905
    Abstract: A magnetic disk cartridge is of the type in which a magnetic disk is rotatably disposed within a jacket. A hardened layer of an ultraviolet ray hardening resin is formed on an inner surface of the jacket which is contacted with a tip of a center pin of a magnetic disk driving apparatus passing through an opening portion of the magnetic disk. The hardness of the hardened layer is 1.times.10.sup.10 dyn/cm.sup.2 to 1.times.10.sup.5 dyn/cm.sup.2.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: October 1, 1991
    Assignee: Kao Corporation
    Inventors: Syuji Kiji, Keizou Takahashi