Amazon received a patent for aerial warehouses that would deploy drones for deliveries. The company describes its airborne fulfillment centers as airships that would float at high altitudes - possibly up to 45,000 feet - and deploy UAVs to deliver items from their inventories to designated locations. According to the patent, the centers would be propped by blimps and positioned over metro areas for faster deliveries. The drones would be able to navigate horizontally using little or no power, except to stabilize or guide their descent. The idea is to drastically lower the energy and costs required to fly the vehicles. - THE MERCURY NEWS