The patent is specifically for "directed fragmentation of unmanned airborne vehicles," or in other words, controlled destruction of drones. The flight controllers can analyze such factors as the drone's flight path, current conditions and the ground it's flying over in order to determine the best way to destroy it in any given situation. If they detect a disruption in its operation, the drone can safely break into multiple pieces and avoid injuring anyone or damaging property.
This comes after Amazon filed a patent earlier this year to complete deliveries by parachuting packages from the sky. The parachutes might even be embedded within the shipping labels. The idea of drone deliveries might sound wild, but the company is clearly invested in trying to make them work under different conditions.