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Amazon has long had ambitions for autonomous package delivery, but before drone delivery can go into wider use, there’s some obstacles to overcome. Recently, the company has filed for numerous patents, from a drone beehive placed in populated areas to dropping packages with parachutes to a massive airship. Business Insider spotted a new patent filing: one for a network of mobile workstations based on boats, tractor trailer trucks, trains, or other vehicles, which can be driven to areas of high demand.

The idea presented in the patent filing kind of nuts: it would set up a network of roving, intermodal delivery systems that would act both as a maintenance hub and merchandise warehouse for Amazon’s drone fleet. The patent essentially…

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