Patents by Inventor Yoshhiro Oguchi

Yoshhiro Oguchi 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: 5178995
    Abstract: An optical information recording medium comprises at least one compound, selected from the compounds of the general formulae (1-I) to (3-III) shown and pyrylium compounds, and a metal chelate compounds in the recording medium.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: January 12, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuro Fukui, Yoshhiro Oguchi, Kyo Miura, Yoshio Takasu