A control device controls undesirable emissions from devices in an environment by transmitting signals to devices in the environment. The signals can be either control signals that require the devices in the environment to operate at a reduced functionality, or warning signals indicating an acceptable...http://www.google.fr/patents/US6603397?utm_source=gb-gplus-shareBrevet US6603397 - Control of emissions by devices in sensitive environments
Control of emissions by devices in sensitive environments
