Sony Corporation cleared of infringement charges on two patents involving charge-coupled devices

Finnegan successfully defended Sony Corporation against Loral Fairchild Corporation’s claims for infringement of two patents on charge-coupled devices (CCDs), first obtaining a judgment of no infringement as a matter of law in the district court and then maintaining that judgment on appeal to the Federal Circuit. Following a jury verdict that Loral’s patents were valid and infringed under the doctrine of equivalents, the district court granted Sony’s motions that infringement of one patent was precluded by prosecution history estoppel and that infringement of the other patent could not stand under a proper claim interpretation. On a certified appeal to the Federal Circuit, the court upheld the judgment that Sony did not infringe either of Loral’s patents.