Patent ID: 7363042

Claim:
A system for restricting radio frequency transmissions of a cellular telephone within a restricted area comprising: i) a restricted area wherein all radio transmissions are restricted, that restricted area being either a fixed-location contiguous physical space, or a moving vehicle's interior contiguous physical space, where a cellular telephone might be operable; ii) a nonempty set of cellular telephones disposed within the restricted area, each cellular telephone including a radio frequency transmitter for transmitting, and a radio frequency receiver for receiving radiofrequency signals; iii) a radio frequency transmissions inhibitor, the radio frequency transmissions inhibitor being capable of selectively disabling the radio frequency transmissions of a first selected subset of the plurality of cellular telephones, this selective disabling being directly responsive, at least in part, to whether or not the cellular telephone is in the restricted area; and iv) an emergency override, the emergency override capable of selectively enabling the radio frequency transmissions of a second selected subset of the plurality of cellular telephones, wherein if a cellular telephone is a member of the first selected subset and a member of the second selected subset, the cellular telephone's radio frequency transmissions are enabled.