Patents by Inventor Tetuya Shihara

Tetuya Shihara 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 disk apparatus and computer with the optical disk apparatus built in
    Patent number: 6295260
    Abstract: The optical disk apparatus of the present invention includes: a light source; an optical disk loader for loading an optical disk thereon; a converging optical system, provided between the optical disk loaded on the optical disk loader and the light source, for converging a light beam, which has been emitted from the light source, on the optical disk; and a type recognizing circuit for generating an optical disk recognition signal including information representing whether the optical disk loaded on the optical disk loader is a writable optical disk or a read-only optical disk. The apparatus further includes an irradiation intensity adjusting mechanism for changing, responsive to the optical disk recognition signal, an irradiation intensity of the light beam on the optical disk.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: September 25, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetuya Shihara, Katsuya Watanabe