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| Number | Title | Issue Date |
| 6574320 | Coin release mechanism of payphone A payphone coin release device includes a base plate fixed inside the payphone casing and having a pivotal pin extending therefrom to rotatably support thereon a driven link having two opposite arms of which one is rotatably pivoted at one end of an inter... | 06/03/2003 |
| 6490458 | Portable phone bank A portable telephone bank includes a group of public telephones connected to a central communication unit. The public telephones permit callers to place telephone calls over a public telephone network. Each of the telephones includes a portable handset th... | 12/03/2002 |
| 6304643 | Pay phone deposit method for limiting overpayment by a customer A method for limiting overpayment at a coin-operated telephone is disclosed. According to the method, a customer may initiate a call by first depositing a plurality of coins and then dialing the desired number. Once the number is dialed, the phone obtains... | 10/16/2001 |
| 6178230 | System and method for identifying a callee of an incoming telephone call The present invention comprises an improved telephone system and method that determine the identity of the callee of an incoming telephone call. A distinctive ring is selected by one or more of the users of the telephone prior to activating the feature or... | 01/23/2001 |
| 6052452 | Pay phone A pay phone having an operation module acted with a switch hook and a push button, the operation module including a base frame, a movable frame pivoted to the base frame and defining with the base frame a coin passage for guiding an inserted coin from a c... | 04/18/2000 |
| 6031901 | Pay phone A pay phone includes a buffer block provided to buffer the falling of inserted coins, enabling inserted coins to be guided through a coin track and detected by sensor means, a motor controlled to turn a coin receiving control board through a set of gears,... | 02/29/2000 |
| 5940773 | Access controlled terminal and method for rendering communication services An arrangement for rendering services such as for example telephone communication, data communication and so on comprising a terminal unit and an access unit, the terminal unit comprising a terminal-unit-identification code (PINt) which is stor... | 08/17/1999 |
| 5737402 | Coin release mechanism of pay phone A pay phone coin release mechanism includes a base plate fixed inside the pay phone casing and having a pivot pin extending therefrom to rotatably supported thereon a driven link having two opposite arms of which one has a pin formed thereon and the other... | 04/07/1998 |
| 5483583 | Pay phone A coin transmission control mechanism for a pay phone, including a plurality of projecting rods and slots below the projecting rods, a control plate connected to the projecting rods and having an actuating strip extended out of the telephone body of the p... | 01/09/1996 |
| 5373552 | Tone Burst Generator A tone burst generator where a continuous tone voltage is applied across two series-connected semiconductor switches each having an ON state and an OFF state. A first control circuit controls the state of the first switch and the variable impedance in an ... | 12/13/1994 |
| 5216707 | Circuit for firing paystation coin relay using power derived from telephone line tip/ring voltage Increased power to operate a paystation coin relay is derived from the tip/ring pair by means of a power boost circuit, which is controllably coupled to the tip/ring pair when the coin relay is to be fired. To fire the coin relay, a line coupling relay ci... | 06/01/1993 |
| 5187739 | Answer supervision circuit for paystation telephone with non-muted microphone A call progress circuit for both a customer owned, coin operated telephone and a regulated telephone is provided that does not mute the paystation's transmitter, so that voice signals from the calling party may be heard by the called party, thereby preven... | 02/16/1993 |
| 4815123 | Coin-operated telephone apparatus A coin-operated telephone having a housing enclosing a coin acceptor and an associated coin release mechanism which are positioned above a display area. A coin release actuator mechanism is mounted on top of the coin acceptor and includes a rocker arm whi... | 03/21/1989 |
| 4809319 | Coin-operated telephone apparatus A coin-operated telephone having a housing enclosing a coin acceptor having a coin release mechanism secured thereto. A coin release mechanism actuator assembly is carried in the housing and disposed for actuation of the coin release mechanism by causing ... | 02/28/1989 |
| 4105867 | Control circuit for pay telephones and the like A control circuit for a pay phone including a coin unit where money is deposited and validated, an entry circuit having a first input connected to the coin unit for entry of amounts deposited, a second input to the entry circuit for communicating thereto ... | 08/08/1978 |
| 3997726 | Coin telephone set Coin telephone set comprising a telephone station adapted to be connected to two wires of a telephone line from a telephone exchange, a call charge signal detecting circuit connected in parallel to the telephone station, an assembly of control and monitor... | 12/14/1976 |
