Why courts use a hypothetical negotiation
When a patent is infringed, the infringer never actually paid for a license — the infringement occurred without the patent owner's consent. To calculate what damages the infringer owes, courts construct a hypothetical: what would a reasonable royalty have been? The framework, established in Georgia-Pacific Corp. v. U.S. Plywood Corp. (S.D.N.Y. 1970) and adopted by the Federal Circuit, imagines a negotiation between a willing patent owner and a willing infringer, just before infringement began, with both parties knowing the patent is valid and infringed. This construct reflects the principle that the minimum compensatory damages in a patent case should be what the infringer would have had to pay for a license — otherwise, infringement would be cheaper than licensing. The § 284 floor — 'no event less than a reasonable royalty' — embodies this principle.
The 15 Georgia-Pacific factors
The 15 Georgia-Pacific factors are an analytical tool — a non-exhaustive list of considerations that guide expert analysis of what the hypothetical negotiation would have produced. The most influential factors in modern patent damages practice: Factor 1 (established royalties for the patent in suit) — prior licenses for the same patent are highly probative; Factor 2 (comparable patent royalties) — rates for technically and commercially similar patents; Factor 5 (commercial relationship between the parties) — the parties' competitive relationship affects negotiating leverage; Factor 10 and 11 (utility and extent of use) — how valuable the patented feature is and how much the infringer actually used it; Factor 13 (apportionment of profit to patented features) — reflects the requirement to isolate the patent's contribution from non-patented features. Expert witnesses present the Georgia-Pacific analysis and the opposing expert challenges specific factors. Courts review the expert's methodology — the analysis must be tied to facts rather than speculative assertions.
Apportionment: isolating the patent's contribution
Apportionment is the requirement that damages reflect only the value of the patented feature, not unpatented features or elements in the accused product. The apportionment requirement was reinforced by the Federal Circuit in VirnetX v. Cisco (2014), Ericsson v. D-Link (2014), and CSIRO v. Cisco (2015). A royalty that fails to apportion between the patented and unpatented portions of the accused product is unreliable and subject to exclusion. Methods of apportionment: (1) Comparable licenses — if the negotiating parties used comparable licenses as benchmarks, and those licenses are technically and economically comparable, the royalty rate may already reflect apportionment; (2) Technical apportionment — a technical expert can apportion the patented feature's contribution to the overall product's value based on functional analysis; (3) Consumer surveys — evidence of what features consumers value can inform apportionment. The Smallest Salable Patent-Practicing Unit (SSPPU) is one tool for narrowing the royalty base to a component that incorporates the patented feature.
The Entire Market Value Rule
The Entire Market Value Rule (EMVR) allows the use of the entire accused product's revenue as the royalty base, but only if the patented feature is the basis for customer demand for the entire product. After Uniloc USA v. Microsoft (Fed. Cir. 2011), courts have sharply limited EMVR — it cannot be used merely because it is mathematically convenient to apply a small royalty rate to a large base. The rule applies only when there is evidence that consumers buy the product because of the patented feature. For complex products (smartphones, computers, software platforms) with hundreds of features, it is very difficult to show that any single patent drives overall demand. As a result, plaintiffs typically use SSPPU as the royalty base and apply a higher royalty rate that reflects the patent's contribution to the component. The net result should be the same — a damages figure that reflects the patent's actual value — but the analysis must be structured to demonstrate that the base and rate together satisfy apportionment.
Nash bargaining solution and rule-of-thumb analyses
Some damages experts have used Nash bargaining solution (which suggests a 50/50 split of the surplus from a successful negotiation) or simple rule-of-thumb approaches (like the 25% rule — the licensee pays 25% of profits as a royalty rate). The Federal Circuit has repeatedly criticized these approaches as unreliable. In Uniloc, the court rejected the 25% rule as a 'fundamentally flawed' 'rule of thumb' that lacks support in the specific facts of the case. Nash bargaining has similarly been criticized for not being tied to the actual facts and available comparable licenses. The lesson: damages analyses must be grounded in case-specific facts — comparable licenses for the same or similar technology, actual market rates for comparable technology, and specific evidence of the patent's value to the particular infringer — rather than abstract economic theories or industry-wide averages.
Lost profits as an alternative to reasonable royalty
Reasonable royalty via hypothetical negotiation is the minimum floor under § 284, but patent owners who can prove lost profits may recover more. Lost profits require proving: (1) demand for the patented product; (2) absence of acceptable non-infringing substitutes; (3) the patent owner had the manufacturing and marketing capacity to meet the demand; and (4) the amount of profit that would have been made. The Panduit factors (Panduit Corp. v. Stahlin Bros. Fibre Works, 6th Cir. 1978) are the traditional framework. Lost profits are typically larger than reasonable royalty because they capture the full profit margin on lost sales, not just a royalty percentage. However, lost profits are harder to prove — the patent owner must show it would have made those specific sales. Practicing entities (companies that sell products using the patent) can pursue lost profits; non-practicing entities cannot. In many cases, patent owners claim lost profits for some lost sales and reasonable royalty for infringing sales that would not have been made by the patent owner anyway (the so-called 'two-supplier market' analysis).
Frequently Asked Questions
What is the hypothetical negotiation in patent damages?
The hypothetical negotiation is the primary framework for calculating a 'reasonable royalty' in patent infringement cases. Under 35 U.S.C. § 284, patent damages must be 'adequate to compensate for the infringement, but in no event less than a reasonable royalty.' The hypothetical negotiation constructs a fictional negotiation between a willing licensor (the patent owner) and a willing licensee (the infringer), conducted just before infringement began (the 'priority date' for the negotiation). Both parties are hypothetically assumed to know the patent is valid and infringed, and both want to reach a deal. The resulting royalty from this constructed negotiation is the reasonable royalty. The 15 Georgia-Pacific factors (from Georgia-Pacific Corp. v. U.S. Plywood Corp., S.D.N.Y. 1970) guide the analysis, examining factors like comparable licenses, the parties' positions in the industry, and the patent's value to the specific infringer.
What are the 15 Georgia-Pacific factors?
The 15 Georgia-Pacific factors (Georgia-Pacific Corp. v. U.S. Plywood Corp., 318 F. Supp. 1116, S.D.N.Y. 1970) are: (1) royalties the patent owner received for licensing the patent in suit; (2) rates paid by the licensee for use of comparable patents; (3) nature and scope of the license (exclusive vs. non-exclusive, restricted or non-restricted territory); (4) licensor's policy for maintaining exclusivity; (5) commercial relationship between licensor and licensee; (6) effect of selling the patented specialty in promoting licensee's other sales; (7) duration of the patent and term of the license; (8) established profitability of the product made under the patent; (9) utility and advantages of the patented property over old modes or devices; (10) nature of the patented invention and the benefits to those who use it; (11) extent to which infringer has made use of the invention; (12) portion of profit or selling price customary in the particular business; (13) portion of realizable profit attributable to the patented invention as opposed to non-patented elements; (14) opinion testimony of qualified experts; and (15) amount resulting from an actual negotiation between parties in a hypothetical setting. Not all factors apply in every case — experts select the most relevant factors given the facts.
What is the royalty base and how is apportionment applied?
The royalty base is the revenue or quantity upon which the royalty rate is applied to calculate damages. The two competing approaches are: (1) Entire Market Value Rule (EMVR): uses the revenue of the entire accused product as the base; permissible only when the patented feature drives consumer demand for the entire product — a high bar post-Uniloc USA v. Microsoft (Fed. Cir. 2011) and CSIRO v. Cisco (Fed. Cir. 2015); (2) Smallest Salable Patent-Practicing Unit (SSPPU): limits the base to the smallest salable component that incorporates the patented feature; even when using SSPPU, further apportionment may be required to reflect the patented feature's contribution relative to other non-patented features in the component. The principle underlying apportionment is that royalty damages should reflect only the economic value of the patented invention, not unpatented features or elements. Courts after Uniloc and related cases have emphasized that simply multiplying a large revenue base by a small royalty rate does not satisfy apportionment — the rate and base together must reflect the patented technology's contribution.
What is the priority date for the hypothetical negotiation?
The hypothetical negotiation is deemed to occur just before the infringing activity began — typically just before the first date of infringement. This is critical because the parties are assumed to know, at that moment, that the patent is valid and infringed. The patent is not hypothetically assumed to be worthless or uncertain — both parties negotiate with knowledge of the patent's validity and the infringer's need for a license. This 'book of wisdom' principle was established in Sinclair Refining Co. v. Jenkins Petroleum Process Co. (S.Ct. 1933): the hypothetical negotiation can consider what the parties would have known about the invention's value even if some of that information only emerged later (like actual commercial success of the product). However, courts limit the look-ahead — information discovered only years later may not be attributable to the hypothetical negotiation date if it was truly unforeseeable.
How do comparable licenses affect the hypothetical negotiation?
Comparable licenses are often the most probative evidence in a hypothetical negotiation — they show what real parties in the same industry have agreed to pay for similar technology. Georgia-Pacific factors 1 and 2 directly address comparable licenses: prior licenses for the patent in suit (factor 1) and rates paid for comparable patents (factor 2). For comparable licenses to be probative, they must be technologically and economically comparable: technically comparable (the licensed technology is similar in function and importance to the patent in suit); economically comparable (the licensing structure and scope are similar — e.g., a patent pool rate or a rate obtained under litigation threat may not be comparable to a freely-negotiated license). Courts exclude comparables that differ too significantly in scope, coverage, or circumstances. Licenses obtained under 'litigation hold' (negotiated to settle ongoing litigation) are often discounted because they reflect settlement dynamics rather than arm's-length valuations.