Lost Profits

Lost profits compensate patent owners for sales they would have made but for the infringement: LEGAL BASIS: 35 U.S.C. § 284: 'damages adequate to compensate for the infringement' — the Supreme Court held in Aro Manufacturing Co. v. Convertible Top Replacement Co. (S.Ct. 1964) that the patent owner is entitled to be made whole for actual losses; BUT-FOR CAUSATION: lost profits require proving that but for the infringement, the patent owner would have made the sales captured by the infringer; this is a counterfactual analysis; WHEN LOST PROFITS ARE AVAILABLE: the patent owner competes with the infringer in the same market; the infringer's products diverted sales from the patent owner; WHEN LOST PROFITS ARE NOT AVAILABLE: the patent owner does not make or sell a product covered by the patent (NPE, university, failed company); the patent owner cannot prove causation; the market has many non-infringing alternatives; HIGHER POTENTIAL RECOVERY: lost profits are typically higher than reasonable royalty because: they are based on the patent owner's own profit margin (which may be 30-60%); they cover the full lost sale, not just a royalty on the infringer's sale; PANDUIT TEST: the Panduit Corp. v. Stahlin Bros. Fibre Works (6th Cir. 1978) four-factor test is the dominant framework; ALL FOUR factors must be satisfied; if any factor fails, lost profits may not be available for that category of sales; PARTIAL RECOVERY: patent owners often recover lost profits for some infringing sales and reasonable royalty for others; the two measures can be combined in the same case.

The Panduit test requires proof of four elements: FACTOR 1 — DEMAND FOR THE PATENTED PRODUCT: there must be demand for the patented invention in the market; NOT demand for the patent owner's specific product — demand for the invention itself; proof: sales figures; market research; customer testimony; industry reports; FACTOR 2 — ABSENCE OF ACCEPTABLE NON-INFRINGING SUBSTITUTES: the market must have no acceptable alternatives that would have captured the diverted sales instead; a 'substitute' must be: legally available (not infringing another patent, not off the market); technically and commercially acceptable to customers; Panduit: the substitute must be acceptable to buyers; a cheap, inferior substitute may not be 'acceptable'; TWO-SUPPLIER MARKET: if only the patent owner and the infringer are in the market, causation is easy (all of the infringer's sales would have gone to the patent owner); multi-supplier market: must show customers would have switched to the patent owner, not a third supplier; FACTOR 3 — MANUFACTURING AND MARKETING CAPACITY: the patent owner must have had the capacity to make and sell the additional units; if the patent owner was capacity-constrained, only the capacity portion of the infringer's sales can be recovered as lost profits; excess capacity above actual production is the relevant capacity measure; FACTOR 4 — AMOUNT OF LOST PROFIT: calculate the profit per unit the patent owner would have made on the additional sales; patent owner's own profit margin (not infringer's) is the measure; contributions margin: revenue minus variable costs; fixed costs already paid so not subtracted; note: lost profits measure the PATENT OWNER's profit, not the infringer's profit (this distinguishes it from unjust enrichment).

Lost profits include several categories of harm beyond directly diverted sales: DIVERTED SALES (CORE RECOVERY): the sales the patent owner would have made directly from the infringer's customers; each infringing unit = one potentially lost sale for the patent owner; reduced by the probability that each customer would have bought from the patent owner (market share analysis); PRICE EROSION: the infringer's entry into the market depressed prices; the patent owner had to lower prices to compete; price erosion damages = (pre-infringement price − actual price) × actual units sold by patent owner; requires expert economic analysis of but-for price; significant in markets with price-sensitive buyers; CONVOYED SALES: products sold together with the patented product; if the patent owner would have made convoyed sales along with the patented product sales, those profits are recoverable; example: a patented printer cartridge — the printer hardware sold with the cartridge; if the infringer's cartridge sale displaced the patent owner's printer sale, the printer's profits are convoyed damages; INCREASED COSTS: costs the patent owner incurred because of the infringement (increased marketing; lowered margins on retained sales); difficult to quantify; INCREMENTAL PROFITS: the calculation uses INCREMENTAL profit — revenue minus variable costs only; fixed costs are sunk and not subtracted; the patent owner bears the burden of proving what costs would have increased to service the additional sales; MULTIPLE MARKETS: if the patent owner sells in multiple markets and the infringer affected only some, lost profits may be calculated separately for affected markets; FUTURE PROFITS: § 284 covers damages through the date of judgment; ongoing infringement after judgment is addressed by enhanced damages or injunction.

The two-supplier market approach simplifies but-for causation in patent cases: THE TWO-SUPPLIER SCENARIO: if only the patent owner and the infringer sell the patented product in the relevant market: all infringer sales would have gone to the patent owner (but for the infringement); no other supplier would have captured the sales; causation is straightforward; MARKET SHARE APPROACH (MORE COMMON): in markets with multiple suppliers, the patent owner uses market share analysis: the patent owner's market share represents the probability that any given infringer sale would have gone to the patent owner; example: patent owner has 40% market share; infringer sold 1,000 units; 400 units of lost profits claimed; LAM RESEARCH v. INTEL: multiple suppliers in a market with acceptable non-infringing substitutes = patent owner recovers only its market share portion as lost profits; remaining portion recovered as reasonable royalty; PANDUIT FACTOR 2 IN MULTI-SUPPLIER MARKETS: the existence of non-infringing substitutes does not automatically defeat all lost profits; instead, only the sales the patent owner would have captured are recoverable as lost profits; SUPPLY CHAIN CONSIDERATIONS: if the infringer is an upstream component supplier, the patent owner may be a downstream product manufacturer; lost profits may include downstream product profits, not just component value; complex cases require expert economic analysis tracing the impact through the supply chain; DEMAND ELASTICITY: some customers are price-sensitive; if the infringer charged less than the patent owner would have, some customers would not have bought from the patent owner even without the infringement; this elasticity affects the but-for market share calculation; INCREMENTAL CUSTOMERS: some infringer customers are new to the market (not diverted from patent owner); these incremental customers may not generate lost profits for the patent owner.

Patent owners often seek both lost profits and reasonable royalty in the same infringement case: HYBRID APPROACH: the patent owner may prove: lost profits for the infringing units where all Panduit factors are satisfied; reasonable royalty (the statutory minimum) for the remaining infringing units; WHY SOME SALES QUALIFY AND OTHERS DON'T: the patent owner may not have capacity to fill all diverted sales (Factor 3 fails for excess sales); some customers would have bought from a third-party substitute (Factor 2 fails for those customers); the infringing sales were in a market where the patent owner doesn't compete; CALCULATION STEPS: Step 1: calculate total infringing units; Step 2: determine which units qualify for lost profits (Panduit satisfied); Step 3: calculate lost profit damages for qualifying units; Step 4: calculate reasonable royalty for remaining units; Step 5: add lost profits + reasonable royalty for total damages; PRICE EROSION ON RETAINED SALES: even when some sales are recovered as lost profits, the patent owner may have also lowered prices on sales it did make; price erosion damages added separately; BURDEN OF PROOF: the patent owner bears the burden of proving each category; reasonable royalty is the fallback for any unproven lost profits; JURY PRESENTATION: complex hybrid cases require careful jury instructions and clear presentation; expert witnesses testify on each component; SETTLEMENT INCENTIVES: hybrid cases are expensive to litigate; the combination of lost profits + reasonable royalty + price erosion + enhanced damages creates significant settlement leverage for patent owners who have a competing product.