Patents by Inventor Saturo Yamashita

Saturo Yamashita 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 information recording medium
    Patent number: 7180848
    Abstract: An optical information recording medium is composed of at least a phase-change type recording layer 4 provided on a substrate 1. The optical information recording medium is conducted to record and erase information by changing a phase of the phase-change type recording layer by irradiating light. The phase-change type recording layer is further composed of TiwGexSbyTez, wherein each of w, x, y and z is in atomic percent and satisfies following relations: 0.5?w?4.0, 3.4?x?14.5, 2.1?y/z?4.0 and w+x+y+z=100.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: February 20, 2007
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Osamu Akutsu, Saturo Yamashita, Katsunori Ohshima, Kenji Oishi
  • Optical information recording medium
    Publication number: 20040142277
    Abstract: An optical information recording medium is composed of at least a phase-change type recording layer 4 provided on a substrate 1. The optical information recording medium is conducted to record and erase information by changing a phase of the phase-change type recording layer by irradiating light. The phase-change type recording layer is further composed of TiwGexSbyTez, wherein each of w, x, y and z is in atomic percent and satisfies following relations: 0.5≦w≦4.0, 3.4≦x≦14.5, 2.1≦y/z≦4.0 and w+x+y+z=100.
    Type: Application
    Filed: January 7, 2004
    Publication date: July 22, 2004
    Applicant: JVC (VICTOR COMPANY OF JAPAN, LTD.)
    Inventors: Osamu Akutsu, Saturo Yamashita, Katsunori Ohshima, Kenji Oishi