Amazon won a patent for a system to deliver packages through a network of underground tunnels, reports GeekWire.
While the Seattle-based retailer filed for the patent three years ago, it was issued and published more than a month ago.
The filing details specifications for a underground network that could transport packages via conveyor belts, rails or pneumatic tubes to and from rail stations, airports, fulfillment centers, locker storage cites and customers, according to the report.
The tunnel network could avoid the congestion of traditional transportation networks, according to Xiaoshan Cai, a software development engineer at Amazon.
Within the last two weeks, news broke on another patent Amazon won for a "floating warehouse" — an airborne fulfillment center that would act as a launch pad for drones to deliver items to customers.
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