Fitchburg-based Promega Corp. was handed a defeat Wednesday by the U.S. Supreme Court, which ruled in favor of a California firm in a patent infringement case that limits the international reach of U.S. patent laws.

The justices ruled unanimously that a shipment by Life Technologies Corp. of a single part of a patented invention for assembly in another country did not violate patent laws.

Life Technologies supplied an enzyme used in DNA analysis kits to a plant in London and combined it with several other components to make kits sold worldwide. Promega sued, arguing that the kits infringed a U.S. patent. Read the full story here.