The songs may be old, but a team from Irell & Manella made some new copyright law this week, beating back a would-be class action against CBS Corp. and CBS Radio.

The broadcaster was sued in Los Angeles federal court in 2015 by four record companies that own pre-1972 sound recordings made by artists such as Al Green, the Everly Brothers, Andy Williams, Jackie Wilson and The Chi-Lites. The companies said that CBS had no right to air the recordings without obtaining a license from them.