Reasonable royalty

A reasonable royalty is the statutory floor for patent damages. It is reconstructed through a hypothetical negotiation between a willing licensor and a willing licensee on the eve of first infringement, informed by the fifteen Georgia-Pacific factors, and constrained by the requirements of apportionment so that the patentee captures the value of the patented invention and not the value of unpatented features.

The rule

Upon a finding of infringement, the court "shall award the claimant damages adequate to compensate for the infringement, but in no event less than a reasonable royalty for the use made of the invention by the infringer." 35 U.S.C. § 284. A reasonable royalty represents the amount that a willing licensor and a willing licensee would have agreed upon, in an arm's-length negotiation conducted just before the infringement began, on the assumption that both parties believed the patent valid and infringed. The royalty is the statutory minimum: a patentee who proves infringement is entitled to no less, even where lost profits cannot be established and even where the patentee has not licensed or practiced the patent.

Although called a "royalty," the recovery is a form of compensatory damages, not a contract price. Courts therefore evaluate the reasonable royalty under the constraints that govern damages generally: it must be tied to the footprint of the invention, supported by reliable economic evidence, and apportioned so that the patentee is compensated for the patented contribution alone.

Statutory and constitutional source

Section 284 traces to the 1946 amendments that abolished the prior accounting-of-profits remedy in utility patent cases and substituted compensatory damages with a reasonable-royalty floor. The 1952 Patent Act carried that scheme forward and added the provision permitting the court to "increase the damages up to three times the amount found or assessed" — the basis of the modern enhanced damages doctrine. See Title 35 reference.

Section 284 also authorizes interest and costs and instructs the court, "upon request of any party," to determine damages or to have them determined by a jury. The Supreme Court has read the statute to require that damages "be adequate to compensate" — no more and no less — and the Federal Circuit has built the apportionment rules out of that adequacy command. See Garretson v. Clark, 111 U.S. 120 (1884) (foundational apportionment case); Ericsson, Inc. v. D-Link Sys., Inc., 773 F.3d 1201 (Fed. Cir. 2014).

The constitutional foundation is the Patent and Copyright Clause, Article I, § 8, cl. 8, which authorizes Congress to secure to inventors "the exclusive Right to their respective . . . Discoveries." Damages give that exclusive right its principal monetary remedy at law, complementing equitable relief under permanent injunctions.

The framework the courts apply

The hypothetical negotiation

Federal Circuit law adopts a hypothetical-negotiation construct. The fact-finder imagines that, on the date infringement began, the patentee and the infringer met to negotiate a license. Both parties are presumed willing — there is no holdout discount and no holdup premium — and both are presumed to know that the patent is valid, enforceable, and infringed. The negotiation is "ex ante" in form but informed by "ex post" evidence: subsequent sales, profitability, design-around costs, and other facts known by trial may inform what the parties would rationally have agreed to. See Lucent Techs., Inc. v. Gateway, Inc., 580 F.3d 1301, 1324–25 (Fed. Cir. 2009).

The Georgia-Pacific factors

Judge Tenney's opinion in Georgia-Pacific Corp. v. United States Plywood Corp., 318 F. Supp. 1116, 1120 (S.D.N.Y. 1970), enumerated fifteen evidentiary factors that have become the canonical checklist. They include:

1. Established royalties received by the patentee for licensing the patent in suit.
2. Royalty rates paid by the licensee for comparable patents.
3. The nature and scope of the license (exclusive or nonexclusive, territory, field of use).
4. The licensor's policy of maintaining patent exclusivity.
5. The commercial relationship between licensor and licensee (competitors or not).
6. The effect of selling the patented specialty in promoting other sales (convoyed sales).
7. The duration of the patent and the term of the license.
8. The established profitability and commercial success of the patented product.
9. The utility and advantages of the patented invention over the old modes.
10. The nature of the invention, its character in the commercial embodiment, and the benefits to those who used it.
11. The extent of the infringer's use and the value of that use.
12. Customary profit shares or royalties in the industry.
13. The portion of profit credited to the invention as distinct from non-patented features.
14. The opinion of qualified experts.
15. The amount the parties would have agreed upon in the hypothetical negotiation.

Most district courts instruct juries on the Georgia-Pacific factors, with modifications: factor 13 in particular has been re-formulated to make the apportionment requirement explicit. Some judges now decline to read all fifteen and instead instruct on the apportionment principle directly, citing the risk that recitation of inapplicable factors may mislead the jury. See Ericsson, 773 F.3d at 1230–31.

Apportionment and the entire market value rule

Apportionment is the bedrock requirement. Where the patented feature is one component of a larger product, the patentee must "give evidence tending to separate or apportion the defendant's profits and the patentee's damages between the patented feature and the unpatented features." Garretson, 111 U.S. at 121.

The entire market value rule (EMVR) is a narrow exception that allows the patentee to use the price of the entire end product as the royalty base only where the patented feature is the basis for customer demand. LaserDynamics, Inc. v. Quanta Computer, Inc., 694 F.3d 51, 67 (Fed. Cir. 2012), held that "it is not enough to merely show that the [patented] method is viewed as valuable, important, or even essential." The patented feature must drive demand for the entire product. The court vacated a damages award in a laptop case where the patentee had used the price of the entire laptop as the base.

Smallest salable patent-practicing unit

When the EMVR does not apply, the patentee should identify the smallest salable patent-practicing unit (SSPPU) as the royalty base, then further apportion within that unit. LaserDynamics, 694 F.3d at 67–68. The Federal Circuit has clarified that SSPPU is a tool to ensure apportionment, not a per se rule: where the patented feature drives demand for a smaller component, that component's price (apportioned where necessary) is appropriate. VirnetX, Inc. v. Cisco Sys., Inc., 767 F.3d 1308 (Fed. Cir. 2014); Commonwealth Sci. & Indus. Research Org. v. Cisco Sys., Inc., 809 F.3d 1295 (Fed. Cir. 2015).

Comparable licenses

Real-world licenses are often the most probative evidence of a hypothetical rate. They are admissible only where "sufficiently comparable" to the hypothetical negotiation. Lucent, 580 F.3d at 1325, surveyed eight licenses offered as comparable and found most insufficient because they covered different technologies, different terms, or lump sums of unclear basis. ResQNet.com, Inc. v. Lansa, Inc., 594 F.3d 860, 869–73 (Fed. Cir. 2010), required that the patentee tie comparable licenses to the claimed invention, rejecting a damages theory built on licenses to unrelated technology bundles.

FRAND and standard-essential patents

For patents declared essential to a standard and committed to a fair, reasonable, and non-discriminatory (FRAND) license, courts modify the Georgia-Pacific framework. Microsoft Corp. v. Motorola, Inc., 696 F.3d 872 (9th Cir. 2012), and the subsequent bench trial, 2013 WL 2111217 (W.D. Wash. Apr. 25, 2013), held that the FRAND rate must reflect (i) the value of the patented technology apart from its inclusion in the standard, (ii) the risk of royalty stacking across the many SEPs reading on the standard, and (iii) the patentee's contractual obligation not to discriminate. The Federal Circuit has approved the same general approach. Ericsson, 773 F.3d at 1230–35.

Burden and proof

The patentee bears the burden of proving damages by a preponderance of the evidence. SmithKline Diagnostics, Inc. v. Helena Labs. Corp., 926 F.2d 1161, 1164 (Fed. Cir. 1991). The patentee must offer a reasonable royalty, but where its proof is insufficient the court may not enter zero — § 284 forbids that — and must instead determine a reasonable royalty on the record. Apple Inc. v. Motorola, Inc., 757 F.3d 1286, 1326–28 (Fed. Cir. 2014), overruled in part on other grounds.

Damages questions of historical fact are for the jury when properly demanded. Apportionment is a fact question, but the legal sufficiency of the patentee's apportionment theory is a question for the court on Rule 50 motions and on Daubert. Power Integrations, Inc. v. Fairchild Semiconductor Int'l, Inc., 904 F.3d 965, 977 (Fed. Cir. 2018).

An award of pre-judgment interest under § 284 is presumptively required absent a justification for withholding it. Gen. Motors Corp. v. Devex Corp., 461 U.S. 648 (1983).

Interaction with related doctrines

Reasonable royalty is the floor; lost profits are an alternative measure when the patentee can satisfy the Panduit test. A patentee may recover lost profits on some sales and a reasonable royalty on the remainder ("split recovery").

Section 284's enhancement provision allows the court to "increase the damages up to three times the amount found or assessed," subject to the standard set in Halo Electronics, Inc. v. Pulse Electronics, Inc., 579 U.S. 93 (2016). See willfulness and enhanced damages. Enhancement applies to a reasonable-royalty award, not only to lost profits.

The patentee's recovery is bounded by the marking and notice requirement of 35 U.S.C. § 287(a) for patents covering products, and by the six-year limitations rule in § 286. After Arctic Cat Inc. v. Bombardier Recreational Prods. Inc., 950 F.3d 860 (Fed. Cir. 2020), the marking obligation persists once a licensee sells unmarked products, and the patentee must police compliance to recover pre-notice damages.

Reasonable-royalty analysis interacts with patent exhaustion, which extinguishes the patentee's right to collect a further royalty after an authorized first sale, and with claim construction, which fixes the technical scope of "the use made of the invention" for which compensation is owed.

Practical notes

Expert reports and Daubert

Damages experts retained under Federal Rule of Evidence 702 must articulate (i) the royalty base, (ii) the royalty rate, and (iii) a defensible apportionment methodology connecting the two to the footprint of the patented invention. Failures recur in three areas:

• Unsupported EMVR. Using the entire product's price as the base without proving the patented feature drives demand. LaserDynamics; Uniloc USA, Inc. v. Microsoft Corp., 632 F.3d 1292 (Fed. Cir. 2011) (rejecting the "25 percent rule of thumb").
• Non-comparable licenses. Reliance on portfolio licenses, settlements late in litigation, or licenses to different technologies without an economic adjustment. ResQNet; LaserDynamics, 694 F.3d at 77–79 (settlement-license discount).
• Built-in apportionment defects. Selecting a comparable license whose own base was the entire product, then applying its rate to the SSPPU without correction. Commonwealth Sci. & Indus. Research Org., 809 F.3d 1295.

Daubert challenges are filed in advance of trial and frequently dispositive of damages theories. Rule 26(a)(2) reports must disclose the bases and assumptions; supplementing at trial is disfavored.

Jury instructions

Most district courts now use instructions modeled on the Federal Circuit Bar Association or AIPLA model, which fold apportionment into a unified instruction rather than recite the Georgia-Pacific factors verbatim. The Ericsson court approved instructions that warned the jury about royalty stacking, the value of standardization, and the need to apportion to the patented feature.

Lump sum versus running royalty

The hypothetical negotiation may produce either form. A lump sum reflects a paid-up license at the time of the negotiation; a running royalty is paid per unit or as a percentage of revenue. Conversion between the two requires sales forecasts and risk adjustments and is a frequent subject of cross-examination.

Trial sequencing and bifurcation

Some courts bifurcate damages from liability under Federal Rule of Civil Procedure 42(b) where damages discovery is voluminous and where bifurcation may avoid unnecessary work. Bifurcation is more common in the District of Delaware and parts of the Eastern District of Texas than in the Western District of Texas. See discovery.

Open questions

• SSPPU as a per se rule. The Federal Circuit has stated that SSPPU is a tool, not a rule, but district courts continue to disagree on whether a damages expert must always begin at the SSPPU or whether some patents permit a higher-level base when accompanied by adequate apportionment.
• FRAND in U.S. courts. Whether and when a U.S. court may set a worldwide FRAND rate, and how it should treat foreign anti-suit injunctions, remains unsettled. Microsoft v. Motorola set one in a contract action; the contours in pure-patent cases are still developing.
• Settlement licenses. Their admissibility under Federal Rules of Evidence 408 and 403 turns on factual comparability and on whether the rate is informed by litigation pressure rather than market value.
• Use of artificial-intelligence outputs in royalty calculations. Daubert standards for machine-learning-driven economic models are an emerging issue.

See also

• Lost profitsThe alternative damages measure under § 284, governed by the Panduit four-factor test.
• Willfulness and enhanced damagesWhen a court may enhance an award up to threefold under Halo.
• Permanent injunctionsThe eBay four-factor equitable test for forward-looking relief.
• Patent exhaustionHow an authorized first sale ends the right to collect further royalty on the same article.
• Claim constructionDefines the scope of "the use made of the invention" subject to royalty.
• eBay v. MercExchangeThe pivot from automatic injunctions toward damages-only awards in many cases.

Authorities

Statutes and rules

• 35 U.S.C. § 284 (damages)
• 35 U.S.C. § 286 (six-year limitations on damages)
• 35 U.S.C. § 287 (marking and notice)
• Fed. R. Evid. 702 (expert testimony / Daubert)
• Fed. R. Civ. P. 26(a)(2) (expert disclosures)
• Fed. R. Civ. P. 42(b) (bifurcation)

Cases

• Garretson v. Clark, 111 U.S. 120 (1884)
• Georgia-Pacific Corp. v. United States Plywood Corp., 318 F. Supp. 1116 (S.D.N.Y. 1970)
• Gen. Motors Corp. v. Devex Corp., 461 U.S. 648 (1983)
• Lucent Techs., Inc. v. Gateway, Inc., 580 F.3d 1301 (Fed. Cir. 2009)
• ResQNet.com, Inc. v. Lansa, Inc., 594 F.3d 860 (Fed. Cir. 2010)
• Uniloc USA, Inc. v. Microsoft Corp., 632 F.3d 1292 (Fed. Cir. 2011)
• LaserDynamics, Inc. v. Quanta Computer, Inc., 694 F.3d 51 (Fed. Cir. 2012)
• Microsoft Corp. v. Motorola, Inc., 696 F.3d 872 (9th Cir. 2012)
• Ericsson, Inc. v. D-Link Sys., Inc., 773 F.3d 1201 (Fed. Cir. 2014)
• VirnetX, Inc. v. Cisco Sys., Inc., 767 F.3d 1308 (Fed. Cir. 2014)
• Commonwealth Sci. & Indus. Research Org. v. Cisco Sys., Inc., 809 F.3d 1295 (Fed. Cir. 2015)
• Power Integrations, Inc. v. Fairchild Semiconductor Int'l, Inc., 904 F.3d 965 (Fed. Cir. 2018)
• Arctic Cat Inc. v. Bombardier Recreational Prods. Inc., 950 F.3d 860 (Fed. Cir. 2020)

Last reviewed: 2026