Apple Inc. asked a U.S. appeals court to force Samsung Electronics Co. to stop using unique features and designs of the iPhone that were found to be infringed by a federal jury last year. "Apple spent five years and $5 billion to develop a product and it was a revolutionary product," said Apple lawyer William Lee of WilmerHale in Boston. "Samsung said, 'We can copy it easily.' They spent three months to bring a product to market." Apple is asking the U.S. Court of Appeals for the Federal Circuit in Washington, which specializes in patent law, to overturn an order letting Samsung continue selling products that a California federal jury said infringed Apple patents. The jury awarded $1 billion in compensation, although part of the damages must be retried. Samsung, which denies infringing the patents, said there was no link between Apple's patented ideas and any lost market share.