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Mark J Stefik, Peter L Pirolli: System for controlling the distribution and use of digital works using digital tickets. Nixon Peabody, July 26, 2001: US20010010045-A1 (1 worldwide citation)

A system for controlling the distribution and use of digital works using digital tickets. In the present invention, a “digital ticket” is used to entitle the ticket holder to exercise some usage right with respect to a digital work. Usage rights are used to define how a digital work may be used or d ...


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Mark J Stefik, Peter L T Pirolli: Method and system for conducting transactions between repositories. CONTENTGUARD HOLDINGS, Rimon P C, Marc Kaufman, April 24, 2018: US09953328

A method, system and software for establishing a secure communications channel between repositories using a repository transaction protocol, including generating a registration identifier and registration message including an identification certificate, and an identifier of a master repository that ...


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Mark J Stefik, Glen W Petrie, Steve A Okamoto, Nicholas H Briggs: System for controlling the distribution and use of rendered digital works through watermarking. ContentGuard Holdings, Marc S Kaufman, Amardeep S Grewal, Reed Smith, March 7, 2017: US09589111

A trusted rendering system for use in a system for controlling the distribution and use of digital works. A trusted rendering system facilitates the protection of rendered digital works which have been rendered on a system which controls the distribution and use of digital works through the use of d ...


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Stefik Mark J, Pirolli Peter L, Merkle Ralph C: System for controlling the distribution and use of digital works having a fee reporting mechanism. Contentguard Holdings, October 1, 2003: EP1349043-A2

A trusted system having at least one repository for controlling use of digital works in accordance with usage rights associated with the digital works. A request to use a digital work in accordance with usage rights associated with the digital work is received. The usage rights specify a manner of u ...


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Stefik Mark J: System for controlling the distribution and use of digital works utilizing a usage rights grammar. Contentguard Holdings, March 19, 2003: EP1293865-A2

A system for controlling use and distribution of digital works. The present invention allows the owner of a digital work to attach usage rights (1450) to their work. The usage rights define how the individual digital work may be used and distributed (1451). Instances of usage rights are defined usin ...


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Stefik Mark J: System for controlling the distribution and use of digital works utilizing a usage rights grammar. Contentguard Holdings, March 19, 2003: EP1293866-A2

A system for controlling use and distribution of digital works. The present invention allows the owner of a digital work to attach usage rights (1450) to their work. The usage rights define how the individual digital work may be used and distributed (1451). Instances of usage rights are defined usin ...


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Stefik Mark J, Casey Michalene M: System for controlling the distribution and use of digital works. Contentguard Holdings, March 19, 2003: EP1293871-A2

A system for controlling use and distribution of digital works, in which the owner of a digital work (101) attaches usage rights (102) to that work. Usage rights are granted by the "owner" of a digital work to "buyers" of the digital work. The usage rights define how a digital work may be used and f ...


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Stefik Mark J, Casey Michalene M: System for controlling the distribution and use of digital works. Contentguard Holdings, March 19, 2003: EP1293872-A2

A system for controlling use and distribution of digital works, in which the owner of a digital work (101) attaches usage rights (102) to that work. Usage rights are granted by the "owner" of a digital work to "buyers" of the digital work. The usage rights define how a digital work may be used and f ...