Patents by Inventor Nobuhiro Tokusyuku

Nobuhiro Tokusyuku 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).

  • Information recording medium
    Patent number: 4645712
    Abstract: A information recording medium has characteristics of high sensitivity and high density. The medium has a double layer formed on a transparent substrate, the double layer comprising a highly transparent recording layer, for example, Sb.sub.2 Se.sub.3 layer and a highly reflective layer, for example, Bi layer. The highly transparent recording layer includes Bi so as to set a minimum value of a reflection factor in prerecording 8 to 16 percentages.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: February 24, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Masaji Ishigaki, Tetsu Ohishi, Nobuhiro Tokusyuku, Yoshie Kodera, Yukio Fukui