Patents by Inventor Youko Oikawa

Youko Oikawa 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).

  • Recording member and process for recording
    Patent number: 4069487
    Abstract: A recording member for recording a laser beam bearing an information by deformation of a recording layer comprises a support, a recording layer of a non-metallic material and a protecting layer which is not destroyed by the laser beam.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: January 17, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanao Kasai, Youko Oikawa, Hiroshi Ito, Hiroshi Matsuno