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:
Jul. 03, 2007
Filed:
Jun. 24, 2002
Applicants:
Yoichiro Sako, Tokyo, JP;
Takashi Kihara, Chiba, JP;
Shinichi Kazami, Kanagawa, JP;
Inventors:
Assignee:
Sony Corporation, , JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
Optical discs on which enciphered data is recorded include first recording areas, where enciphered contents data is recorded, and second recording areas provided at the position where a read-out operation is carried out ahead of the first recording areas and including a first area portion, where cipher key data for decoding enciphered contents data is recorded, and a second area portion, where identification data for identification of the recording medium modulated by a modulation system different from that of at least the first area portion is recorded.