Background
Akamai Technologies held patents covering a method of delivering Internet content using a content delivery network (CDN) — a geographically distributed system of servers that stores and delivers web content close to end users. The claimed method required that content providers “tag” their content for CDN delivery (a step performed by Akamai’s customers) and that the CDN operator host and deliver the tagged content (steps performed by the CDN operator).
Limelight Networks operated a competing CDN. Limelight itself performed the hosting and delivery steps, but Limelight’s customers performed the tagging step, not Limelight. Under the direct-infringement framework of Muniauction v. Thomson (2008), no single party performed every step, so there was no direct infringement — and without direct infringement, Akamai’s inducement claim would fail under conventional doctrine. A Federal Circuit panel reversed the jury’s infringement verdict; Akamai sought en banc review.
The Court’s Holding
The en banc Federal Circuit reversed and held that inducement liability under 35 U.S.C. § 271(b) can exist even when no single party commits direct infringement of all steps. The court reasoned that the entire basis of inducement doctrine is to hold responsible a party whose actions lead to infringement even when the inducer does not personally complete every infringing act. The court held that where all steps of a method claim are performed — some by the defendant, others by parties acting at the defendant’s direction — the defendant who actively induced those collective performances can be held liable for infringement.
The court declined to revisit Muniauction’s direct-infringement holding but concluded that inducement under § 271(b) does not strictly require an underlying act of direct infringement by a single party. Inducement requires only that all the steps be performed, and that the defendant knowingly induced those performances with specific intent to cause infringement. Importantly, the court’s reasoning was later reversed in part by the Supreme Court in Limelight Networks v. Akamai Technologies (2014), which held that inducement requires an underlying act of direct infringement under § 271(a).
Key Takeaways
- The Federal Circuit’s 2012 en banc decision held that inducement liability could attach even absent a single-party direct infringer — expanding method patent enforcement against CDN operators, platform providers, and multi-party system architects.
- A defendant that orchestrates multiple parties to collectively perform all steps of a claimed method can face inducement liability if it acts with knowledge of the patent and specific intent to cause infringement.
- The Supreme Court subsequently rejected this reading in 2014, reinstating the requirement of an underlying act of direct infringement for inducement — though the Federal Circuit later addressed divided direct infringement on remand.
- For patent drafters, the case highlighted the enduring importance of drafting method claims that can be directly infringed by a single party without relying on end-user performance of key steps.
Why It Matters
The Akamai en banc decision was a turning point in one of the most contested areas of patent law in the Internet era. Many of the most economically valuable method patents — covering cloud computing, content delivery, e-commerce, and networked software — involve steps naturally distributed across service providers and their customers. The Federal Circuit’s willingness to expand inducement liability to cover these divided performances offered patent holders a powerful new theory of infringement.
Though the Supreme Court reversed the specific legal theory in 2014, the ultimate question of how to handle divided method infringement remained unresolved, and the Federal Circuit addressed it again on remand by revisiting the direct-infringement standard from Muniauction. The Akamai litigation saga — spanning multiple Federal Circuit and Supreme Court decisions from 2008 through 2015 — represents one of the most closely watched doctrinal evolution stories in modern patent law.