Wrist Watching: Amazon Patents System To Track, Guide Employees' Hands

A diagram from an Amazon patent application shows a human worker (labeled with "14") wearing an ultrasonic bracelet tracking his or her hand movements and providing feedback. The patent was granted on Tuesday. Amazon/U.S. Patent and Trademark Office hide caption A diagram from an Amazon patent application shows a human worker (labeled with "14") wearing an ultrasonic bracelet tracking his or her hand movements and providing feedback. The patent was granted on Tuesday. The U.S. Patent and Trademark Office has granted Amazon two patents for wristbands that could track the exact location of warehouse workers' hands -- and give workers tactile feedback to help guide them to a specific shelf.