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:
May. 18, 2010
Filed:
Apr. 03, 2006
Eiji Muramatsu, Saitama, JP;
Shoji Taniguchi, Saitama, JP;
Kunihiko Horikawa, Saitama, JP;
Masahiro Kato, Saitama, JP;
Toshio Suzuki, Saitama, JP;
Kazuo Kuroda, Saitama, JP;
Eiji Muramatsu, Saitama, JP;
Shoji Taniguchi, Saitama, JP;
Kunihiko Horikawa, Saitama, JP;
Masahiro Kato, Saitama, JP;
Toshio Suzuki, Saitama, JP;
Kazuo Kuroda, Saitama, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A disc-shaped information recording medium includes a first recording layer (Llayer) having (I) a first trial write area (P-) for trial write of first trial write information for calibration of the laser beam along the first track path (TP) from the inner circumference toward the outer circumference and (II) a first recording area for recording the first recording information along a first track path (TP), in this order from the inner circumference side. Furthermore, the disc-shaped information recording medium includes a second recording layer (Llayer) having (I) a second trial write area (P-) for trial write of second trial write information for calibration of the laser beam along the second track path (TP) from the outer circumference toward the inner circumference and (II) a second recording area for recording the second recording information along a second track path (TP), in this order from the inner circumference side.