Having duked it out over patents on the West Coast, Apple Inc. and Samsung Electronics Co. brought the latest stage of their fight to a federal appeals court in Washington on Friday, arguing over when courts can block the sale of products as a remedy for infringement.

In the U.S. Court of Appeals for the Federal Circuit, Apple is challenging a federal trial judge's denial of the company’s request for a permanent injunction blocking the sale of Samsung products that a jury found infringed on Apple's patents, or ones "not more than colorably different." Apple is claiming the judge improperly created a new standard requiring Apple to prove that the patented features at issue drove consumer demand for Samsung's infringing products.