What could be more convenient than having the milk for your cereal arrive fresh each morning, or that forgotten dinner ingredient plonked down on the doorstep just as you fire up the stove? Well, details now revealed in an Amazon patent application suggest that if its Prime Air drones do materialize, they mightn't just be limited to making house calls. The application outlines plans for drones that track a customer's GPS position, flagging the possibility of having items brought to you even when you're out and about. 

Stuck in a traffic jam and in need of a snack? Out boating on the lake and out of refreshments? Amazon's "Bring it to Me" delivery option may one day come to rescue. This feature was one of a number of finer details revealed in the patent filed last September and now made public by the US Patent & Trademark Office. 

"With the implementations described herein, a user now has the ability to choose "Bring It To Me," the patent states. "With this option, the actual location of the user is determined and the UAV delivers the item to the current location of the user... For example, the user may identify their current location by allowing Global Positioning System ("GPS") data to be provided by their mobile device."