Former drone-maker QFO Labs, Inc. has announced that it will shift from product manufacturing to patent licensing, filing suit against Amazon (0:17-cv-05014), Best Buy (0:17-cv-05011), and Target (0:17-cv-05012) in the process. The complaints allege infringement of three patents through the provision of various drones made by Parrot along with related mobile apps that use a smartphone’s orientation sensor to control the drones. Parrot has been engaged in litigation with QFO Labs since August of last year following the termination of a partnership between the plaintiff and retailer Brookstone, which once sold QFO Labs’ drones but dropped them in favor of Parrot’s in 2014.