[A]ll the steps of a claimed method must be performed in order to find induced infringement, but that it is not necessary to prove that all the steps were committed by a single entity.

On August 31, 2012, in Akamai Techs., Inc. v. Limelight Networks, Inc. and McKesson Techs. Inc. v. Epic Sys. Corp, the U.S. Court of Appeals for the Federal Circuit en banc (Rader, Newman, Lourie, Bryson, Linn, Dyk, Prost, Moore, O'Malley, Reyna, Wallach), in a per curiam opinion, reversed and remanded the Massachusetts district court's judgment as a matter of law that Limelight did not infringe U.S. Patent No. 6,108,703, which related to a method for efficient delivery of web content, and the Georgia district court's summary judgment that Epic did not infringe U.S. Patent No. 6,757,898, which related to a method of electronic communication between healthcare providers and their patients. The Federal Circuit stated:

[F]or a party to be liable for direct patent infringement under 35 U.S.C. § 271(a), that party must commit all the acts necessary to infringe the patent, either personally or vicariously. In the context of a method claim, that means the accused infringer must perform all the steps of the claimed method, either personally or through another acting under his direction or control. Direct infringement has not been extended to cases in which multiple independent parties perform the steps of the method claim. Because direct infringement is a strict liability tort, it has been thought that extending liability in that manner would ensnare actors who did not themselves commit all the acts necessary to constitute infringement and who had no way of knowing that others were acting in a way that rendered their collective conduct infringing. For that reason, this court has rejected claims of liability for direct infringement of method claims in cases in which several parties have collectively committed the acts necessary to constitute direct infringement, but no single party has committed all of the required acts.

To be sure, the court has recognized that direct infringement applies when the acts of infringement are committed by an agent of the accused infringer or a party acting pursuant to the accused infringer's direction or control. Absent an agency relationship between the actors or some equivalent, however, a party that does not commit all the acts necessary to constitute infringement has not been held liable for direct infringement even if the parties have arranged to "divide" their acts of infringing conduct for the specific purpose of avoiding infringement liability. Because the reasoning of our decision today is not predicated on the doctrine of direct infringement, we have no occasion at this time to revisit any of those principles regarding the law of divided infringement as it applies to liability for direct infringement under 35 U.S.C. § 271(a).

Because section 271(b) extends liability to a party who advises, encourages, or otherwise induces others to engage in infringing conduct, it is well suited to address the problem presented by the cases before us, i.e., whether liability should extend to a party who induces the commission of infringing conduct when no single "induced" entity commits all of the infringing acts or steps but where the infringing conduct is split among more than one other entity.

Induced infringement is in some ways narrower than direct infringement and in some ways broader. Unlike direct infringement, induced infringement is not a strict liability tort; it requires that the accused inducer act with knowledge that the induced acts constitute patent infringement. In fact, this court has described the required intent as follows: "[I]nducement requires that the alleged infringer knowingly induced infringement and possessed specific intent to encourage another's infringement." On the other hand, inducement does not require that the induced party be an agent of the inducer or be acting under the inducer's direction or control to such an extent that the act of the induced party can be attributed to the inducer as a direct infringer. It is enough that the inducer "cause[s], urge[s], encourage[s], or aid[s]" the infringing conduct and that the induced conduct is carried out.

An important limitation on the scope of induced infringement is that inducement gives rise to liability only if the inducement leads to actual infringement. That principle, that there can be no indirect infringement without direct infringement, is well settled. The reason for that rule is simple: There is no such thing as attempted patent infringement, so if there is no infringement, there can be no indirect liability for infringement. That much is uncontroversial.

Requiring proof that there has been direct infringement as a predicate for induced infringement is not the same as requiring proof that a single party would be liable as a direct infringer. If a party has knowingly induced others to commit the acts necessary to infringe the plaintiff's patent and those others commit those acts, there is no reason to immunize the inducer from liability for indirect infringement simply because the parties have structured their conduct so that no single defendant has committed all the acts necessary to give rise to liability for direct infringement.

A party who knowingly induces others to engage in acts that collectively practice the steps of the patented method -- and those others perform those acts -- has had precisely the same impact on the patentee as a party who induces the same infringement by a single direct infringer; there is no reason, either in the text of the statute or in the policy underlying it, to treat the two inducers differently. In particular, there is no reason to hold that the second inducer is liable for infringement but the first is not.

Likewise, a party who performs some of the steps itself and induces another to perform the remaining steps that constitute infringement has precisely the same impact on the patentee as a party who induces a single person to carry out all of the steps. It would be a bizarre result to hold someone liable for inducing another to perform all of the steps of a method claim but to hold harmless one who goes further by actually performing some of the steps himself. The party who actually participates in performing the infringing method is, if anything, more culpable than one who does not perform any steps.

In the McKesson case, Epic can be held liable for inducing infringement if it can be shown that (1) it knew of McKesson's patent, (2) it induced the performance of the steps of the method claimed in the patent, and (3) those steps were performed. McKesson preserved its claim of induced infringement . . . . McKesson is entitled to litigate that issue on remand to the district court.

In the Akamai case, although the jury found that the content providers acted under Limelight's direction and control, the trial court correctly held that Limelight did not direct and control the actions of the content providers as those terms have been used in this court's direct infringement cases. Notwithstanding that ruling, under the principles of inducement laid out above, Limelight would be liable for inducing infringement if the patentee could show that (1) Limelight knew of Akamai's patent, (2) it performed all but one of the steps of the method claimed in the patent, (3) it induced the content providers to perform the final step of the claimed method, and (4) the content providers in fact performed that final step.

Although the patentee in Akamai did not press its claim of induced infringement at trial, it argues this court should overrule "the mistaken view that only a single entity can infringe a method claim." That argument, while focused on direct infringement, is critical to the conclusion that divided infringement can give rise to liability, whether under a theory of direct infringement or induced infringement. While we do not hold that Akamai is entitled to prevail on its theory of direct infringement, the evidence could support a judgment in its favor on a theory of induced infringement. For that reason, we conclude that Akamai should be given the benefit of this court's ruling disapproving the line of divided infringement cases that the district court felt compelled to follow. We therefore reverse the judgment in both cases and remand in both cases for further proceedings on the theory of induced infringement.