Melissa Massie first discovered that she didn't own the rights to her restaurant's name when Sonic Drive-In accused her of violating federal trademark law. Suddenly, the 26-year-old Spokane business owner found herself scrambling to find a new name for Sonic Burritos, the popular Gonzaga University-neighborhood hangout she purchased in 2003, or face a lengthy, expensive legal battle over the rights to keep the name.