Pay phone deposit method for limiting overpayment by a customer
Pay station telephone call routing apparatus
Pay station telephone coin box apparatus
Pay station telephone interface
Pay station telephone interface circuits
Pay telephone
Pay telephone
Pay telephone stand
Pay telephone vault guard
Pay-per use for data-network-based public access services
Payphone electronic coin validator
Payphone management system
Paystation monitor circuit to prevent fraudulent use
Paystation theft inhibiting circuit
Paystation transmitter ground detect circuitry
Permanent connection public telephone appliance
Pin fraud and shock prevention system
Plastic coin receptacle for pay telephones
Plug-in telephone facility
Pre-paid phone card system with promotional link