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. 08, 2009
Filed:
Aug. 19, 2004
Masato Yamamichi, Ota, JP;
Masami Yamamichi, Legal Representative, Ota, JP;
Satomi Yamamichi, Ota, JP;
Keiko Yamamichi, Maebashi, JP;
Motoji Ohmori, Hirakata, JP;
Masaya Yamamoto, Arcadia, CA (US);
Kazuhisa Watanabe, Yokohama, JP;
Atsushi Saso, Yokohama, JP;
Naoaki Yamamoto, Tokyo, JP;
Masato Yamamichi, Ota, JP;
Masami Yamamichi, legal representative, Ota, JP;
Satomi Yamamichi, Ota, JP;
Keiko Yamamichi, Maebashi, JP;
Motoji Ohmori, Hirakata, JP;
Masaya Yamamoto, Arcadia, CA (US);
Kazuhisa Watanabe, Yokohama, JP;
Atsushi Saso, Yokohama, JP;
Naoaki Yamamoto, Tokyo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A content reproduction system that allow the user to rent or purchase any desired contents for reproduction without depending on a predetermined type of information of the user. The content reproduction system includes: a recording medium storing a license ticket including an encrypted master key; and a reproduction apparatus that receives from the user a request for a selected content and the information of the selected content, acquires distribution content information corresponding to the selected content, stores it in association with the license ticket into the recording medium. When reproducing the content, the reproduction apparatus generates a content using an encrypted content decryption key and an encrypted content that are contained in the distribution content information, and using a master decryption key information corresponding to the distribution content information, and reproduces the generated content.