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:
Feb. 26, 2008
Filed:
Aug. 29, 2002
Koichi Terada, Sagamihara, JP;
Yukio Fujii, Yokohama, JP;
Yoshifumi Fujikawa, Sagamihara, JP;
Taruhi Iwagaki, Yokohama, JP;
Koichi Terada, Sagamihara, JP;
Yukio Fujii, Yokohama, JP;
Yoshifumi Fujikawa, Sagamihara, JP;
Taruhi Iwagaki, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A technique for distributing digital contents capable of effectively protecting copyrights and the like on the basis of invisible electronic watermark information and electronic watermark information is to be provided. On the sending side, additional information including copyright-related information is embedded into digital contents in advance as invisible electronic watermark information, while on the receiving side, additional information as the embedded invisible electronic watermark information is decoded and extracted as visible watermark information, the extracted information is embedded again into the digital contents, and the additional information is distributed or outputted as visible information together with the digital contents.