In AKAMAI TECHNOLOGIES, INC. v. LIMELIGHT NETWORKS, INC. (Fed Cir. August 31, 2012) the en banc court held that a person can be liable for inducement to infringe even if the direct infringement is only found by combining the acts of more than one other person. You can read all 103 pages of the case here: Akamai v Limelight
What? In English: If you are aware of a patent (inducement requires specific intent to induce, so it requires knowledge of the patent) and you either perform one step in the method and induce one or more other persons to perform the remaining steps, or if you induce two or more other persons to engage in steps that together infringe, you are liable for inducement to infringe.
This is a major change in the law. This case overruled a recent prior case that had held that inducement requires inducing a single other party to engage in the acts that constitute direct infringement.
What does this mean? It means that if you are a business that say, provides a load balanced server farm for your clients, and you make that server farm available to your clients, who use it to manage their web content, and Akamai informs you of their patent that covers this technology, you will be liable for inducement to infringe even though the mere operation of a server farm does not practice every element in the claims of the patent. It means that businesses that are made aware of patents will have to consider every conceivable set of steps, whether done by their clients or others (inducement does not require any agency between the inducer and the person engaging in direct infringement) because the patent holder can “aggregate” all of the users it needs to meet the requirement of showing infringement.
There were numerous dissenting opinions, and it is somewhat probable that the Supreme Court will take this case.