Fraud prevention in an electronic coin telephone set
Fraud prevention system and method
Full coin box signalling device for use with coin telephones
Hand-held pay telephone and holder
Handicap telephone with associated booth
Holder and credit-card unlatching mechanism for a hand-held tele
Inductive coin validation system and payphone using such system
Information payphone
Integrated cocot and regulated paystation telephone system
Intelligent public telephone system and method
Intelligent vending system and method
International speaker telephone
Line card with distributed signaling voltages
Line powered pay telephone with power management
Line-powered pay telephone
Low voltage operated coin relay
Lower casing structure of payphone
Magnetic pay telephone cash box proximity switch
Method and apparatus for authorization based phone calls in...
Method and apparatus for awarding and redeeming prepaid telephon