0715247-A1 is referenced by 280 patents and cites 3 patents.

A system for controlling the distribution and use of digital works (101) using digital tickets. In the present invention, a "digital ticket" is used to entitle the ticket holder to exercise some usage right (102) with respect to a digital work. Usage rights are used to define how a digital work may be used or distributed. Each usage right may specify a digital ticket which must be present before the right may be exercised. Digital works are stored in repositories which enforce digital works usage rights (105) when usage of a digital work is requested by a requesting repository (103,104). Each repository has a "generic ticket agent" which punches tickets. In some instances only the generic ticket agent is necessary. In other instances, punching by a "special ticket agent" residing on another repository may be needed.

Title
System for controlling the distribution and use of digital works using digital tickets
Application Number
EP19950308422 19951123
Publication Number
0715247 (A1)
Application Date
November 23, 1995
Publication Date
June 5, 1996
Inventor
Pirolli Peter L T
US
Stefik Mark J
US
Assignee
Xerox
US
IPC
G06F 01/00
H04N 07/24
H04L 29/06
H04L 12/14
H04L 09/32
G09C 01/00
G06Q 50/00
G06Q 30/00
G06Q 20/00
G06F 21/00
G06F 01/00
G06F 12/00
H04N 07/24
H04L 29/06
H04L 12/14
H04L 09/32
G09C 01/00
G06Q 50/00
G06Q 30/00
G06Q 20/00
G06F 21/24
G06F 21/00
G06F 01/00
G06F 12/00
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