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:
Dec. 07, 2010
Filed:
Mar. 24, 2006
Applicants:
Seiro Oshima, Koufu, JP;
Masataka Yamaguchi, Koufu, JP;
Toshihiko Takishita, Koufu, JP;
Takao Tagiri, Koufu, JP;
Inventors:
Seiro Oshima, Koufu, JP;
Masataka Yamaguchi, Koufu, JP;
Toshihiko Takishita, Koufu, JP;
Takao Tagiri, Koufu, JP;
Assignee:
Pioneer Corporation, Tokyo-To, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B 3/02 (2006.01); G11B 7/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.