A court battle over modern-day rights to the names of two 1950s doo-wop groups — The Platters and The Coasters — has now sparked an appeal that could have far-reaching effects in civil rights litigation.

In Singer Management Consultants Inc. v. Milgram, the 3rd U.S. Circuit Court of Appeals has granted en banc rehearing before a 16-judge court to decide on the proper test for determining when a plaintiff is entitled to attorney fees as the “prevailing party.”