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:
Oct. 04, 2011
Filed:
Mar. 07, 2003
Masaru Yamaoka, Kadoma, JP;
Takashi Yumiba, Kyotanabe, JP;
Takahiro Nagai, Osaka, JP;
Hideshi Ishihara, Katano, JP;
Masaru Yamaoka, Kadoma, JP;
Takashi Yumiba, Kyotanabe, JP;
Takahiro Nagai, Osaka, JP;
Hideshi Ishihara, Katano, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A digital work () and copyright management information () for the digital work are recorded on an information recording medium () by altering a shape, a position or a pattern () of recording mark edges of the digital work. Alternatively, a decryption key for the right management information is recorded on an information recording medium on which the copyright management information has been recorded encrypted, by altering the recording mark edges of the copyright management information. Alternatively, a check code for the copyright management information is recorded on the information recording medium by altering the recording mark edges. The check code is checked when the copyright management information is read, thus detecting illegal use of the copyright management information.