Patents by Inventor Hiroyuki Imatake

Hiroyuki Imatake 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 recording medium
    Patent number: 5158859
    Abstract: An optical recording medium for performing writing and reading on a pit by use of a light of beam comprises an optical recording layer comprising a porous layer.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: October 27, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Imatake, Mizuho Hiraoka, Yoshihiro Ogawa, Hitoshi Yoshino, Sachiko Ichikawa, Seijiro Kato