Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2005-08-02
2005-08-02
Trammell, James P. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
C705S050000, C705S052000, C705S053000, C705S054000, C705S056000, C705S057000, C705S059000, C713S155000, C713S179000, C713S152000, C713S152000, C380S200000, C380S202000, C380S204000
Reexamination Certificate
active
06925448
ABSTRACT:
A digital work recorded on a computer readable media for use within a system having at least one repository for enforcing use of digital content in accordance with usage rights associated with the digital content. The digital work includes digital content electronically recorded on a first media portion and being capable of being rendered by a rendering engine, and usage rights electronically recorded on a second media portion and being associated with the digital content. The usage rights specify a manner of use by which a repository will permit use of the digital content. The usage rights can be constructed of a grammar including symbols selected from a set of predetermined symbols which define a valid sequence of symbols that are interpreted by the repository to indicate the manner of use.
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“National Semicond
Pirolli Peter L.T.
Stefik Mark J.
Abdi Kambiz
ContentGuard Holdings Inc.
Kaufman Marc S.
Nixon & Peabody LLP
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