The scope of patent protection afforded under a patent is defined by the claims. As a general rule, a claim can only be infringed by a single party that practices all of the limitations of the claim. However, what happens if one party outsources a particular step of a method invention or claim to a third party? What if the party provides instructions to the a customer to perform one or more of the steps? Does this party avoid infringement because this party has not performed all of the required steps of the method? This was the issue in Akamai Tech. v. Limelight Networks, Inc. (Fed. Cir. Dec. 20, 2010).