Patents by Inventor Tatsuya Sasaoka

Tatsuya Sasaoka 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).

  • Information recording medium having Al-Ti alloy reflective layer
    Patent number: 4725502
    Abstract: An optical information record medium comprising a transparent substrate, an optical information recording layer, and a reflective metal layer. The reflective metal layer is formed of an aluminum-titanium alloy in which the titanium content is between 0.1 and 10 weight %. The medium has improved stability against corrosion due to the improved reflective metal layer.
    Type: Grant
    Filed: December 5, 1986
    Date of Patent: February 16, 1988
    Assignee: Sony Corporation
    Inventors: Tadashi Kiyomiya, Mitsuo Naito, Tatsuya Sasaoka