The Supreme Court says a company is not liable for inducing patent infringement if someone other than the company carries out some of the steps leading to infringement.

The justices unanimously ruled Monday that Internet content delivery company Limelight Networks Inc. did not infringe on the patented system for managing images and video owned by rival Akamai Technologies Inc.

Akamai claimed Limelight used some of its patented methods for speeding content delivery, and then illegally encouraged its customers to carry out the remaining . The U.S. Court of Appeals for the Federal Circuit agreed, but the Supreme Court reversed.

Justice Samuel Alito said all the steps for must be performed by a single party. Since there was no direct infringement, Alito said there could be no inducement.