Lucasfilm Limited v Ainsworth was a 2011 court ruling by the Supreme Court of the United Kingdom. The case concerned an intellectual property dispute over the production of Lucasfilm's Stormtrooper costumes by model maker Andrew Ainsworth. Mr Ainsworth argued that the helmets, which he continues to manufacture and sell, were functional props covered only by design right legislation, as opposed to Lucasfilm's assertion that they were sculptures or art which fall under copyright law. Design right protection is retained for 15 or 10 years, copyright protection can last considerably longer.