Tamper-deterrent device
Tamperproof pay telephone
Telecommunications fraud prevention system and method
Telecommunications system, service control point and method...
Telephone body guard armor
Telephone calling with automatic billing
Telephone pay station
Telephone relay cover
Telephony system and method with enhanced fraud control
Theft proof pay phone
Toll telephone system and method for maintaining or initiating l
Two-part apparatus and method for protecting coin-operated telep