Popular California-based burger chain In-N-Out filed a lawsuit against DoorDash, a restaurant food delivery start-up founded in 2013.1 Unlike other restaurant delivery services like GrubHub and Seamless, DoorDash has its own drivers and delivery service in exchange of an additional fee, ranging from $2 to $7 depending on location.2 In-N-Out alleged that DoorDash infringed its…