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| Number | Title | Issue Date |
| 6807564 | Panic button IP device A device for requesting emergency assistance having a built-in panic button that may be implemented in hardware or software. The device may be in a wearable configuration so that the user in need of emergency help can carry the device on the user's person, or the de... | 10/19/2004 |
| 6216161 | System for determining whether to connect a terminal to a service provider according to information stored in an information provider for the terminal An information supply apparatus is provided which includes an Information Provider and a Service Provider at a remote location. Information, stored in the Information Provider, is supplied via a communication line with caller or user name identification a... | 04/10/2001 |
| 4926469 | Pay station telephone call routing apparatus An interface (10) is disclosed for coupling a conventional pay station telephone (12) to a telephone switching system (16). The interface (10) provides supervision signal detection functions normally provided by a switching system, and thus can be connect... | 05/15/1990 |
| 4794642 | Call screening in a public telephone station Control equipment employed in a customer-owned public telephone station prevents a user from making unauthorized telephone calls in a telephone system. Operating under the control of a computer in the station, the control equipment employs a call screenin... | 12/27/1988 |
| 4768223 | Public telephone set with internal charge processing A public telephone set that processes call charge information is provided. The set includes a register for holding a pre-determined number of digits of the dialed number and a memory in which dial control codes corresponding to the predetermined number of... | 08/30/1988 |
| 4759050 | Intelligent toll telephone system and method A toll telephone coupled to tip and ring conductors of a toll trunk and through which various toll signals flow between a central office and the telephone (such as a coin ground signal to indicate the presence of the coin) has a hook switch with an off-ho... | 07/19/1988 |
| 4685120 | Electronic trigger switch for maintenance termination unit A telephone maintenance termination unit utilizes a low voltage, bidirectional trigger switch. The trigger switch provides low voltage, low current triggering in conjunction with a high holding current requirement. The trigger switch may comprise either t... | 08/04/1987 |
| 4638121 | Telephone pay station A coin receiving prepay telephone station for local calls includes a telephone receiver and transmitter with a handset and a supporting hook switch cradle therefor. The station further includes a coin chute having an open end for receiving a coin and a lo... | 01/20/1987 |
| 4595983 | Central office powered credit only telephone paystation A credit only paystation for allowing a user to place telephone calls therefrom without having to use coinage coins. The paystation includes a reader to read the users credit information which may be encoded on the magnetic stripe of a conventional credit... | 06/17/1986 |
| 4139736 | Central office coin repeater modification circuit There is provided a modification circuit for prepay telephone central office coin repeaters. The modification circuit includes an improved coin detector circuit that may be used with a circuit for providing coin-free dialing for certain predetermined numb... | 02/13/1979 |
| 4086439 | Class of line identifier apparatus and method therefor An apparatus identifying a class of called telephone lines by extending an identity signal back over the called line to a calling central operator or control. The identifier apparatus includes a signal identity generator connected to the called line, a si... | 04/25/1978 |
| 4063036 | Coin telephone system having restricted coin-free dialing capability A conventional telephone pay station is adapted for coin-free restricted dialing of a preselected number of digits by employing a two-coil latching relay operating a switch for shunting outgoing calls, one coil being operated after a predetermined time de... | 12/13/1977 |
| 3992588 | Multiple digit dialing module A circuit for providing coin-free dialing of a predetermined number of digits is provided for use with a telephone pay station. A signal generator to provide a pulse in response to each telephone number dialed is included. The signal generator is connecte... | 11/16/1976 |
| 3947643 | Method of providing dialtone first on step by step telephone systems A step by step central office serving coin box subsets is provided with a link circuit which on initiation of a call from the coin box sub-set connects the line finder circuit through an auxiliary coin trunk circuit to the central office equipment. This i... | 03/30/1976 |
