Randy Bachman and Fred Turner, they of the Bachman-Turner Overdrive, have been sued by their former bandmates (one of them Randy's brother Robin) over allegations that they are planning on using a variation on their original performing name in breach of past naming agreements.
Robin Bachman and Blair Thornton say that Randy's company recently registered various trademarks around the name Bachman Turner Union, seemingly in preparation for a reunion tour for him and Turner. He presumably went for 'Union' rather than 'Overdrive' because he and Turner signed over the rights to the original band name to Robin and Thornton when the band originally disbanded in the late seventies. But Bachman Turner Union, Robin and Blair presumably allege, is not different enough to avoid infringing the original trademark.
Robin and Turner launched their litigation through the Canadian courts last week. They want an injunction to stop their former bandmates using the Bachman-Turner name, as well as financial damages. The Canadian rockers are, of course, best known for their biggest hit 'You Ain't Seen Nothing Yet'.