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. 17, 2007
Filed:
Sep. 28, 2001
Katsuhiko Sato, Soraku-gun, JP;
Yuji Sawada, Osaka, JP;
Keisuke Iwasaki, Ikoma-gun, JP;
Kazuyuki Nako, Soraku-gun, JP;
Katsuhiko Sato, Soraku-gun, JP;
Yuji Sawada, Osaka, JP;
Keisuke Iwasaki, Ikoma-gun, JP;
Kazuyuki Nako, Soraku-gun, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Reproduction means of a general-purpose computer () reproduces a digital content only when a device ID included in the digital content corresponds to a device ID of a device by which it is intended to reproduce the digital content. When the device ID of the general-purpose computer () is altered, a recovery program for recovering an original device ID is downloaded from a recovery program generation server (), thereby the device ID is recovered. With this arrangement, it is possible to provide a communication system which is capable of recovering a device ID when, for instance, the device ID is altered on account of the reinstall of a program such as an OS or content player.