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:
Aug. 30, 2011
Filed:
May. 17, 2004
Mayuko Tanaka, Yokohama, JP;
Hiroo Okamoto, Yokohama, JP;
Yoshimichi Kudo, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A copyright of a content is protected by preventing creation of illegal copies of the content and the content is prevented from being transmitted beyond a range of personal use in a process to transmit the content through a LAN. Before transmission of a content, a content transmission apparatus and a content reception apparatus perform a determination of authentication information available in a predetermined command accompanying authentication information, or an authentication determination based on a time until reception of a response to a predetermined command request accompanying predetermined authentication information. If the authentication is unsuccessful, the requested content is not transmitted to the content reception apparatus. With such arrangement, it is possible to effectively protect a copyright when a content is transmitted by way of a network.