Ars Technica: An Illinois couple who owned several recording companies specializing in doo-wop, jazz, and rhythm and blues have filed suit against the major satellite and Internet radio companies over their playing of pre-1972 songs. It’s the third lawsuit that highlights how the patchwork of state copyright laws over older music is putting a drag on Internet radio — sound recordings made before 1972 aren’t protected by federal copyright but are protected by many states.