Amazon's drone-delivery plans apparently don't stop with using flying contraptions to ferry people's purchases to their homes. Based on a patent it filed with the USPTO, the e-commerce giant dreams of launching big floating warehouses near crowded areas and happenings like sporting events. The company calls the blimp-like structures "airborne fulfillment centers," because that's precisely what they are. Amazon envisions deploying drones carrying memorabilia or food from these floating warehouses, which will have billboards for advertising, to people attending music festivals or championships. To reduce the work drones have to do, the blimps will have shuttles to lower them and the goods they have to deliver to the ground, as well as to carry stocks and even people up to the flying warehouse.