A system for disabling mobile telephones in circumstances where their use would prejudice the operation of critical systems (e.g. on an aeroplane, or in a hospital), or would irritate others includes a pair of RF beacons situated at the entrance to the controlled zone. The phone has receivers sensitive...http://www.google.fr/patents/US20020039896?utm_source=gb-gplus-shareBrevet US20020039896 - Method and apparatus for disabling mobile telephones
Method and apparatus for disabling mobile telephones
