Since 2007, Chicago teen Lauren McClusky has coordinated McFest, an annual charity concert featuring high school and college bands to benefit the Chicago chapter of Special Olympics.
She has raised about $30,000 so far.
But after she went to register the name with the U.S. Patent and Trademark Office in 2008, McDonald's Corp. filed a challenge. In its petition last August, it claimed her use of the McFest name would be linked to the chain, which has already registered a "Mc" family of trademarked words including Mc$ave, McButton, McRule, McFree and plain old Mc.
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