US 5,634,012 · Granted 1997-05-27

Xerox's 1997 Blueprint for Digital Rights and Pay-Per-Use

Imagine buying a digital song or ebook, but the file itself remembers how many times you can play it or share it—and automatically sends a bill whenever you cross that line. Xerox patented the system that tracks usage rules and fees baked into digital files, sending payment info to a clearinghouse whenever someone uses up their rights.

Curated and verified by the IsItPatented Editorial team

The plain-English version

What it protects

The patent covers a system where usage rights and fees are embedded directly into digital works and stored in controlled repositories. What's protected here is the method of attaching rules (like 'can be played 10 times') and associated fees to digital content, then monitoring when those rules are triggered and automatically generating fee reports that get sent to a billing clearinghouse. The claim extends to the entire flow: repository access control, fee determination, transaction generation, and periodic reporting to a central billing authority.

Why it matters

This patent arrived in 1997, years before iTunes or streaming services, when digital distribution was still theoretical for most people. Xerox was essentially trying to lock down the infrastructure for a 'pay-as-you-go' digital economy—controlling not just who can access a file, but exactly how and how often it can be used, with automatic accounting built in. It represents an early corporate vision of digital rights management as a monetizable system rather than a consumer feature.

Real-world use

Today you see echoes of this whenever you stream music with limited skips, license software with seat restrictions, or encounter ebook files that expire after 21 days—each instance involves usage rules and fee triggers tied to the digital work itself.

Original USPTO abstract

A fee accounting mechanism for reporting fees associated with the distribution and use of digital works. Usage rights and fees are attached to digital works. The usage rights define how the digital work may be used or further distributed. Usage fees are specified as part of a usage right. The digital works and their usage rights and fees are stored in repositories. The repositories control access to the digital works. Upon determination that the exercise of a usage right requires a fee, the repository generates a fee reporting transaction. Fee reporting is done to a credit server. The credit server collects the fee information and periodically transmits it to a billing clearinghouse.

Patent details

Publication number: US 5,634,012
Filing date: 1994-11-23
Grant date: 1997-05-27
Assignee: Xerox Corporation
Inventor(s): STEFIK; MARK J., MERKLE; RALPH C., PIROLLI; PETER L. T.
CPC class: G06F21/10

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