Patents by Inventor Masahide Yagi

Masahide Yagi 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).

  • Optical data recording medium and method of manufacturing the same
    Patent number: 5085910
    Abstract: Disclosed is an optical data recording medium provided with a glass substrate and a recording layer carried by the glass substrate, wherein the glass substrate is composed of a glass plate having a mixed layer of metallic tin or a tin compound formed on at least one surface thereof, a content of the metallic tin or tin compound on the surface of the glass substrate being regulated to 1.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: February 4, 1992
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Seiichi Matsushima, Masahide Yagi, Masahiro Suzuki, Yasuyuki Mori