A wireless automatically-activated bar code symbol reading system for use in a work environment, the system including a device controller programmed to automatically detect when a wireless hand-supportable bar code symbol reader is located inside of a predetermined RF communication range based on measuring...http://www.google.co.uk/patents/US7464878?utm_source=gb-gplus-sharePatent US7464878 - Automatically-activated wireless hand-supportable laser scanning bar code symbol reading system with automatic communication range dependent control
