@Myrth Then there was the extended legal tussle over the Oregon Ducks' use of a duck that Disney decided bore more than a passing resemblance to another Duck whose name begins with D. That tussle ended with Disney backing down and agreeing to a perpetual license for the use of the duck by the university, probably because the judge did one of the judgely things along the lines of "you can pursue this case, but you might not like my final ruling".