McDonald's sued for $900 million by US startup over false advertising claims

US-based Kytch, which sells devices to fix broken ice cream machines, has sued McDonald's for $900 million alleging false advertising and tortious interference with its business. As per Kytch, McDonald's told its franchisees that the startup's devices violated their machines' warranties and could lead to "serious human injury". Kytch denied both the claims and accused McDonald's of defamation.