| Patents for H04M 17 - Prepayment telephone systems (5,258) |
|---|
| 06/29/1988 | EP0272954A1 Device for initiating the metering for a public telephone |
| 06/07/1988 | US4750201 Credit transaction arrangements |
| 05/25/1988 | EP0268333A2 Coin controlled system |
| 05/24/1988 | US4747134 Pay telephone hook switch assembly |
| 05/24/1988 | US4746786 Method and apparatus for evaluating units stored on credit cards |
| 05/03/1988 | CA1236232A1 Coin apparatus for prepay coin telephones |
| 05/03/1988 | CA1236230A1 Control and supervisory system for prepaid call public phone |
| 04/21/1988 | DE3634210A1 Communication system |
| 04/20/1988 | EP0264023A2 A cellular mobile radio credit card system |
| 04/19/1988 | CA1235512A1 Central office powered credit only paystation |
| 04/05/1988 | US4736444 Pay telephone monitoring system |
| 04/05/1988 | US4736408 Safety seat stand apparatus for coin-operated telephone sets |
| 03/15/1988 | US4731818 Self-computing credit card telephone paystation method and system |
| 02/16/1988 | US4726057 Answer detection method and apparatus for coin telephone sets |
| 02/16/1988 | US4726056 Shared flexible rating of telecommunications calls |
| 01/19/1988 | US4720855 Telephone apparatus |
| 01/14/1988 | WO1988000419A1 Shared flexible rating of telecommunications calls |
| 01/12/1988 | US4719648 Coin relay drive and switching circuit for paystation telephone instruments |
| 01/07/1988 | EP0251238A2 Armored cord handset |
| 12/15/1987 | CA1230436A1 Card calling telephone system |
| 11/10/1987 | US4706275 Telephone system |
| 10/14/1987 | EP0240544A1 Network implemented pay telephone set |
| 10/06/1987 | US4698840 Coin operated telephone |
| 09/22/1987 | CA1227249A1 Mobile radio communication system |
| 09/09/1987 | EP0236180A1 Telephonic communication system with a portable hand set |
| 08/12/1987 | EP0232198A1 Protective system of all sites of a network by means of anticipation of a fault |
| 08/04/1987 | US4685126 Telephone pay station and circuit therefor |
| 07/29/1987 | EP0230283A2 Public telephone system and apparatus |
| 07/15/1987 | CN86106976A Fee-collecting telephone equipment for telephone network |
| 06/16/1987 | US4674114 Fraud prevention in an electronic coin telephone set |
| 06/09/1987 | US4672661 Credit card telephone station |
| 05/27/1987 | EP0223213A2 Method for the evaluation of units stored on credit cards |
| 05/26/1987 | US4669109 Telephone apparatus with a fixed telephone station coupled to a mobile and detachable handset |
| 05/26/1987 | CA1222334A1 Fraud prevention in an electronic coin telephone set |
| 05/26/1987 | CA1222332A1 Controller for a coin telephone set |
| 05/06/1987 | EP0138813B1 Arrangement for a payment system utilising a payment card within the telecommunication network |
| 04/23/1987 | DE3537178A1 Arrangement for fee administration |
| 04/09/1987 | WO1987002208A1 Network implemented pay telephone set |
| 04/01/1987 | EP0216521A2 Credit transaction arrangements |
| 03/18/1987 | EP0214170A1 Telephone installation with short range radio transmissions comprising sets each simultaneously usable by a plurality of persons |
| 02/24/1987 | US4645876 Pay telephone |
| 02/17/1987 | US4644109 Alarm information transmission system for coin telephone |
| 02/05/1987 | DE3527827A1 Device for reading status messages of a payphone |
| 02/03/1987 | US4640986 Mobile radio communication system |
| 01/20/1987 | US4638121 Telephone pay station |
| 11/25/1986 | US4625078 Fraud prevention in an electronic coin telephone set |
| 11/12/1986 | EP0200847A2 Method and device for sending and receiving telephone metering impulses on a carrier frequency |
| 10/09/1986 | WO1986005907A1 Rotating drum magazine for storing and managing coins in telephone sets or dispensers |
| 09/16/1986 | US4612418 For use in a public telephone set |
| 09/03/1986 | EP0193470A1 Telephone apparatus with a fixed post and mobile hand set |
| 08/14/1986 | WO1986004756A1 Telephone installation with short range radio transmissions comprising sets each simultaneously usable by a plurality of persons |
| 07/23/1986 | EP0188139A1 Control and monitoring system for a pay-telephone |
| 07/08/1986 | US4599492 Coin-telephone auditor |
| 07/03/1986 | WO1986003915A1 A pay phone system or a pay service system |
| 06/25/1986 | EP0185365A1 A pay phone system or a pay service system |
| 06/17/1986 | US4595983 Central office powered credit only telephone paystation |
| 04/16/1986 | EP0177968A1 Arrangement for the administration of bills for communication installations in hospitals, hotels or the like |
| 03/18/1986 | US4577061 Arrangement for a pay telephone payment system utilizing a payment card within the telecommunication system |
| 03/12/1986 | EP0173813A2 Communication network |
| 03/04/1986 | US4573485 Coin runway with coin sequencing facility |
| 01/29/1986 | EP0169507A2 Telephone set for public use having a integral management microprocessor |
| 01/28/1986 | US4567325 Controller for a coin telephone set |
| 08/21/1985 | EP0151761A2 Electronic coin box, particularly for public telephone utilities |
| 07/18/1985 | WO1985003157A1 Fraud prevention in an electronic coin telephone set |
| 07/17/1985 | EP0148483A2 Controller for a coin telephone set |
| 05/21/1985 | US4518824 Public telephone method and apparatus wherein the user's personal telephone number and a personal dialing code are used to effect debiting charges |
| 05/14/1985 | US4517412 Card-actuated telecommunication network |
| 05/02/1985 | EP0138813A1 Arrangement for a payment system utilising a payment card within the telecommunication network. |
| 03/27/1985 | EP0135196A2 Mobile radio communication system |
| 03/20/1985 | EP0134693A2 Payphone |
| 01/23/1985 | EP0131812A2 Value-rated card readout and obliterating device, particularly for use with public telephone set enabling magnetic cards |
| 12/19/1984 | EP0128754A2 Method for controlling task process and device thereof |
| 11/27/1984 | US4485270 Method for transmitting a charging signal |
| 11/07/1984 | EP0124105A2 Fixed telephone apparatus with a unit for the control equipment removably attached on a base plate |
| 09/25/1984 | CA1175173A1 Coin telephone control circuit |
| 08/08/1984 | EP0115240A1 Telephone set with a bidirectional infrared link between handset and fixed module connected to a subscriber's line |
| 05/02/1984 | EP0106848A1 Circuit for a coin-operated telephone apparatus |
| 03/27/1984 | US4439636 Credit card actuated telecommunication access network |
| 03/15/1984 | WO1984001073A1 Arrangement for a payment system utilising a payment card within the telecommunication network |
| 02/28/1984 | CA1163028A1 Range extender with variable gain for coin telephone loops |
| 01/31/1984 | US4429183 Circuit arrangement for detecting and interpreting interferences with automatic machines and particularly coin telephones |
| 01/17/1984 | CA1160781A1 Coin telephone monitor circuit |
| 11/10/1983 | WO1983003940A1 Circuit for a coin-operated telephone apparatus |
| 10/13/1983 | WO1983003491A1 Coin-operated apparatus, particularly prepayment telephone apparatus |
| 09/14/1983 | EP0088639A2 Credit card actuated telecommunication access network |
| 08/24/1983 | EP0086583A2 Coin runway with sequencing facility |
| 08/16/1983 | US4399330 Communications system, in particular a telephone system, for connecting mobile subscriber terminal devices |
| 07/05/1983 | CA1149494A1 Telephone-switching system and novel public telephone instrument |
| 06/29/1983 | EP0020394B1 Coin-operated telephone apparatus |
| 04/19/1983 | CA1145078A1 Coin signaling system |
| 04/13/1983 | EP0076645A1 Method of and apparatus for transmitting a call charging signal |
| 03/23/1983 | EP0074721A1 Coin collecting apparatus |
| 02/22/1983 | CA1141847A1 Digitally activated coin control circuit |
| 12/15/1982 | EP0066823A1 Improvement to public telephony method and apparatus employing selector-equipped normal and trunk call sets |
| 11/30/1982 | US4361731 Coin telephone control circuit |
| 11/03/1982 | EP0063689A1 Credit card operated telephone |
| 08/25/1982 | EP0058600A1 Alarm circuit for public prepayment telephone station monitoring system |
| 06/22/1982 | CA1126426A1 Initial rate override circuit |
| 06/15/1982 | USRE30973 Telephone station coin memory and control system |
| 06/02/1982 | EP0052951A1 Coin operated equipment |