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:
Jan. 27, 2004
Filed:
Sep. 03, 1997
Yusuke Shimizu, Tokyo, JP;
Yoichi Uchida, Tokyo, JP;
Seiji Adachi, Tokyo, JP;
Eric Rayburn Hammond, Menlo Park, CA (US);
Yasuhiro Noguchi, Emeryville, CA (US);
Paul Mitchell Heilman, III, San Mateo, CA (US);
Daniel Luke Poling, Jr., Redwood City, CA (US);
Sega Enterprises, Ltd., , JP;
Abstract
When program data is distributed to users across an open network, such as the Internet, a licensing agreement concluded between a server for the program data and a manager is maintained and the unauthorized copying of program data is prevented. Therefore, to fulfill such the situation, a program data distribution system includes an open network; a file server, connected to the open network, for distributing encrypted program data; a key server, connected to the open network, for distributing a decryption key used to decode the encrypted program data; and a terminal, connected to the open network, for processing program data, the terminal employing the decryption key distributed by the key server to decode the encrypted program data obtained from the file server.