# Reasonable royalty

The floor for money damages in an infringement case: the royalty the infringer would have agreed to pay in a hypothetical negotiation at the time infringement began. It applies when the patent owner cannot prove lost profits.

**Full entry:** https://patentbrief.org/glossary/reasonable-royalty

**All patent terms:** https://patentbrief.org/glossary

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_Source: PatentBrief — https://patentbrief.org. A plain-English glossary of US patent terms._