The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 2006
Filed:
Jan. 22, 2003
Yuichi Sabi, Tokyo, JP;
Takashi Iwamura, Kanagawa, JP;
Mitsuaki Oyamada, Kanagawa, JP;
Sakuya Tamada, Tokyo, JP;
Yuichi Sabi, Tokyo, JP;
Takashi Iwamura, Kanagawa, JP;
Mitsuaki Oyamada, Kanagawa, JP;
Sakuya Tamada, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical recording medium having two or more information recording layers in which information is recorded at a high recording density. The optical recording medium is comprised of information recording layers between a first surface at which light is incident and a second surface opposite the first surface. The first information recording layer nearest to the second surface is a phase-modulation information recording layer, and the second information recording layer is a reflectance-modulation information recording layer.