Wal-Mart - Smiley Face
Although the image has existed since the 1960s, Wal-Mart attempted to register a trademark on its well-known smiley face logo in 2006. The company had used the image extensively up to that point, but had not attempted to the own legal rights until Franklin Loufrani, who claims to have invented the smiley face and holds rights to it an some other countries, tried to gain exclusive rights to the image in the United States. Both parties failed to get the trademark due to it being too generic, however, and Wal-Mart has since abandoned the logo.
(AP Photo/Paul Sakuma)