M Promoters of an act comprising onetime side musicians for the band Earth, Wind & Fire are using the band's name to sell concert tickets, a federal lawsuit claims. Georgia-based Substantial Music Group LLC and Indiana-based Stellar Communications Inc. are named as defendants in the trademark infringement lawsuit filed by plaintiffs Earth, Wind & Fire IP LLC. Conceived by drummer and bandleader Maurice White, Earth, Wind & Fire churned out several hits in the 1970s and '80s. White died in 2016, leaving ownership of the group's name and trademarks to his sons. Three original members...