Amazon patents delivery drones that can react to people screaming and flailing Amazon patents delivery drones that can react to people screaming and flailing Los Angeles Times Amazon is issued patent for delivery drones that can react to screaming voices, flailing arms Washington Post Amazon patents delivery drones that can recognise ‘unwelcoming’ hand gestures South China Morning Post Full coverage Brought to you by Google News. Read the rest of the article here. FacebookTwitterGoogle+Pinterest