Induced & Contributory Infringement

Feature

Induced (§ 271(b))

Contributory (§ 271(c))

Statute

35 U.S.C. § 271(b)

35 U.S.C. § 271(c)

What the defendant does

Actively encourages or instructs a third party to infringe (instructions, manuals, marketing, technical support)

Sells/imports a component with no substantial non-infringing use that enables a third party to infringe

Knowledge of patent required

Yes — must know patent exists; willful blindness satisfies; negligence does not

Yes — must know patent exists; same standard as induced

Knowledge of infringement required

Yes — must know induced acts constitute infringement; good-faith non-infringement or invalidity belief is a defense (Commil, 2015)

Yes — must know component is especially adapted for infringing use; not just general purpose

Direct infringer

Third party (customers, users)

Third party (customers, users)

Physical product requirement

No — can induce through purely informational acts (instructions, manuals)

Yes — must sell/offer to sell/import a physical component

Non-infringing use defense

Existence of non-infringing uses is relevant to intent (if product has substantial non-infringing use, harder to prove intent to induce infringement)

Absolute defense — if component has substantial non-infringing use, it is a 'staple article' and no contributory infringement

What is induced infringement under § 271(b)?

Induced infringement under 35 U.S.C. § 271(b) makes a party liable for actively inducing another to directly infringe a patent. The key elements are: (1) Direct infringement: a third party must actually directly infringe the patent — there is no induced infringement without an underlying act of direct infringement. (2) Active inducement: the defendant must have affirmatively acted to encourage, instruct, or promote the infringement. This can include product manuals showing how to use a product in an infringing way, customer support instructing infringing use, marketing materials showing the product used in ways that infringe, training materials, online tutorials, and similar acts. Merely selling a product that can be used to infringe is NOT sufficient — there must be active encouragement. (3) Knowledge of the patent: the inducer must have known the patent existed. This was clarified by the Supreme Court in Global-Tech Appliances, Inc. v. SEB S.A. (2011), which held that willful blindness — deliberately avoiding learning about the patent — satisfies the knowledge requirement. However, mere negligence (should have known but didn't investigate) is not enough. (4) Knowledge that induced acts constitute infringement: the inducer must have known the specific acts being induced would constitute patent infringement. The Supreme Court clarified in Commil USA, LLC v. Cisco Systems, Inc. (2015) that a good-faith belief that the patent is invalid, or a good-faith belief in non-infringement, can negate the intent element of induced infringement. However, these beliefs must be genuinely held, not pretextual. Common inducement scenarios: a manufacturer whose product manual instructs customers to use the product in a way that practices a patented method; a company that trains distributors to install its product in an infringing configuration; an app developer who instructs users to configure the app in a manner that infringes a method patent.

What is contributory infringement under § 271(c)?

Contributory infringement under 35 U.S.C. § 271(c) imposes liability on a party that sells, offers to sell, or imports a component specifically adapted for use in infringing a patent, when that component has no substantial non-infringing use. Elements: (1) Direct infringement by a third party (customers or others who complete the infringement by combining or using the component); (2) The defendant sells/offers/imports a component that is a material part of the patented invention; (3) No substantial non-infringing use: the component must not be a 'staple article of commerce' suitable for substantial non-infringing use. A component designed specifically to enable infringement of a particular patent meets this test; a general-purpose part with many uses does not; (4) Knowledge: the defendant must know the component is especially made for infringing the specific patent and know of the patent. The staple article exception is important: if a component has substantial non-infringing uses — even if some uses infringe — it is a staple article and cannot support contributory infringement liability. This is why 'substantial non-infringing use' analysis is critical in contributory infringement cases. Examples: a company that sells a chemical compound that has no purpose other than as a starting material for synthesizing a patented pharmaceutical — the compound has no substantial non-infringing use. Contrast: a company that sells a standard USB connector — even if some users use it in a patented infringing combination, USB connectors have substantial non-infringing uses and are staple articles; no contributory infringement. Contributory infringement is often paired with induced infringement claims — both require underlying direct infringement and knowledge, but contributory infringement focuses on the physical component while induced infringement focuses on the instructions/encouragement.

What is the Global-Tech willful blindness standard for induced infringement?

In Global-Tech Appliances, Inc. v. SEB S.A. (563 U.S. 754, 2011), the Supreme Court held that the knowledge element of induced infringement under § 271(b) can be satisfied by 'willful blindness.' The Court adopted the standard from criminal law: a defendant who takes deliberate actions to avoid knowing about a patent (or about whether its acts constitute infringement) has acted with willful blindness and cannot avoid liability by claiming lack of actual knowledge. Willful blindness requires two elements: (1) the defendant must subjectively believe there is a high probability that a fact exists (e.g., a patent covering the relevant technology); and (2) the defendant must take deliberate actions to avoid learning of that fact. This is more demanding than negligence: mere failure to investigate a known risk is not willful blindness. The defendant must affirmatively avoid knowledge — e.g., instructing engineers not to investigate patents, refusing to hire a freedom-to-operate attorney after a competitor warns of patents, deliberately avoiding reading communications about potential patent issues. In Global-Tech: SEB sued its competitor Global-Tech (Sunbeam) for selling a knockoff of SEB's patented deep fryer in the US. Global-Tech had copied SEB's fryer in detail, even having a US patent search done that revealed no US patent — but Global-Tech's design engineer had copied the fryer without knowing about SEB's US patent application at the time. The Court found that Global-Tech's deliberate copying of a product it knew came from a sophisticated company, combined with its awareness of the risk of foreign patent owners having US patents, was sufficient evidence of willful blindness for the jury to find induced infringement. Practical implication: companies cannot avoid induced infringement liability simply by adopting a policy of 'don't look for patents.' If a company is aware of a significant probability that its competitor holds relevant patents, deliberate non-investigation may constitute willful blindness.

Can a good-faith belief in invalidity or non-infringement defeat an induced infringement claim?

Yes — under Commil USA, LLC v. Cisco Systems, Inc. (575 U.S. 632, 2015), a defendant's good-faith belief that the patent is invalid or that its conduct does not infringe can negate the intent element of induced infringement under § 271(b). The Court held that induced infringement requires proof that the defendant knew the acts it was inducing constituted infringement. If the defendant had a good-faith belief in either non-infringement or invalidity, the defendant did not have the requisite knowledge that its actions would constitute infringement. Important nuances: (1) The belief must be genuinely held, not pretextual. Evidence that the defendant's invalidity belief was constructed after-the-fact to avoid liability is unconvincing. (2) A good-faith belief opinion must be supported by a credible analysis — simply asserting 'we thought it was invalid' without substantive reasoning is unlikely to be credited by a jury. (3) The Court specifically overruled the Federal Circuit's prior holding in Commil that a good-faith invalidity belief was not a defense to induced infringement — the Supreme Court held the opposite. (4) Reliance on counsel's opinion: a defendant who obtains a qualified patent counsel's freedom-to-operate or invalidity opinion and relies on it in good faith has strong evidence of a genuine belief in non-infringement or invalidity. The opinion must be written, detailed, and actually obtained before the alleged infringement began (not constructed post-litigation). Practical implication: when a competitor's patent is known to potentially cover your product or methods, obtain a freedom-to-operate opinion from qualified patent counsel before launch. This serves multiple purposes: (a) identifies whether design-arounds are needed; (b) provides the evidentiary basis for a good-faith belief in non-infringement; (c) may also reduce the risk of enhanced damages for willful infringement.

How does divided infringement work when multiple parties perform different claim steps?

Divided infringement (also called joint infringement) occurs when no single party performs all the steps of a method claim, but together multiple parties collectively perform all the steps. This creates a gap in infringement liability because direct infringement under § 271(a) typically requires a single entity to perform all claimed steps. The law: Akamai Technologies, Inc. v. Limelight Networks, Inc. (Fed. Cir. 2015, en banc) established the current standard for divided infringement: liability for infringement of a method claim exists where: (1) a single entity performs all steps of the method (traditional single-actor direct infringement); or (2) the actions of multiple parties can be attributed to a single entity when: (a) one party directs or controls the other parties' performance of claim steps — meaning the directing party conditions another's participation in an activity or payment on performance of specific claim steps; or (b) the parties form a joint enterprise (mutual right of control, shared pecuniary interest, shared purpose). Pre-Akamai problem: patentees were losing cases against defendants who deliberately structured their infringement across multiple parties (e.g., a defendant performs 9 of 10 claim steps and instructs customers to perform the 10th step). After Akamai (2015 en banc), the 'direction or control' standard makes it harder — but not impossible — to avoid liability through step-splitting. Induction of divided infringement: if a single party induces the combination of multiple parties who together directly infringe all claim steps, that single party can be liable for induced infringement even without direct infringement. This is how Akamai resolved the Limelight case — Limelight's direction of its customers' performance of the missing step was evidence of inducement. Patent drafting strategy: to avoid divided infringement vulnerabilities, method claims should ideally be drafted so that a single potential infringer (typically the defendant, not its customers) performs all claimed steps. If customer actions are necessary, claim the product or system instead of the method.