Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 15 - Arrangements for metering, time-control or time-indication
Patents for H04M 15 - Arrangements for metering, time-control or time-indication (14,957)
02/1991
02/13/1991EP0412298A2 Digital communication unit and method for managing communication charge
01/1991
01/30/1991EP0410657A2 Apparatus and method for processing a freephone number telephone call
01/30/1991EP0410251A1 Access network for wireless telephone service
01/29/1991US4988209 Telephone agent management information system
01/23/1991EP0409417A1 A pay telephone system
01/22/1991US4987587 Method and apparatus for providing 800 number service
01/02/1991CN2068738U Fee counter of public telephone
12/1990
12/27/1990EP0404001A1 Signalisation detector, for metering type signals, for a telephone trunk
12/18/1990US4979207 Method of processing cellular telephone call detail data for billing multi-line customers for cellular telephone services
12/05/1990EP0400911A2 Method and apparatus for restricting credit card communication calls
12/04/1990US4975942 Credit/calling card pay telephone method and system employing telephone unit local card-checking and other intelligence cooperative with local personal host computer
11/1990
11/21/1990CN1047178A Full automatic fare registering system for single telephone set
11/21/1990CN1010541B Telephone fare system in situ
11/20/1990US4972461 Call message delivery system and method
11/15/1990WO1990013961A1 Voice messaging for pay phone telephone systems
11/15/1990DE3915388A1 Electronic telephone exchange line meter pulse counter - operates with subscribers appts. to produce standard sized pulses utilising two operational amplifiers and discrete components
10/1990
10/24/1990CN1046425A Equipment and method for monitoring digital subscribers in telephone network
10/02/1990US4961185 Method for controlling a terminal equipment coupled to an integrated services digital network and a terminal equipment based on the same
09/1990
09/05/1990EP0385670A2 Spontaneous voice and data messaging
08/1990
08/30/1990DE3906518A1 Circuit for recording and storing charge information
08/21/1990CA1273140A1 Device for initializing public telephone charges
08/21/1990CA1273088A1 Toll fraud control override
08/08/1990CN1044562A Microcomputer control system used in automatic trunk service
08/02/1990DE3902568A1 System for local, synchronous billing of telephone charges in digital telephone systems which are connected to ISDN exchange lines
08/01/1990EP0380191A2 Method and apparatus for altering the access format of telephone calls
08/01/1990EP0380190A2 Automatic generation of billing records
08/01/1990EP0380189A2 Method and apparatus for performing an automated collect call
07/1990
07/31/1990CA1272320A1 Answer detection method and apparatus for coin telephone sets
07/24/1990US4943995 Semi-automated customer information system
07/23/1990CA2007839A1 Method and apparatus for performing an automated collect call
07/04/1990EP0376526A2 Telephone agent management information system
07/04/1990CN2059037U Multi-office transmission device for program control telephone charge data
06/1990
06/19/1990US4935956 Automated public phone control for charge and collect billing
06/12/1990US4933966 Method and apparatus for performing an automated collect call
06/12/1990US4933965 Short time validity storage of a billing account number at a local telecommunications station
06/12/1990US4933931 Integrated accounting system
06/05/1990US4932042 Spontaneous voice and data messaging
05/1990
05/30/1990CN1042635A Improvements in mobile pay telephone system
05/16/1990CN2057299U User auto-managing arrangement for national direct dialling trunk-call
05/15/1990US4926465 Method for indicating a communicating duration of an office line in a keyphone system
05/08/1990US4924457 Concentrator system with polling-response means for detecting failures to stop tariff charges on locally established intraoffice calls
04/1990
04/24/1990US4920563 Circuit compensating for the attenuation of a notch filter at frequencies less than cut-off frequency thereof
04/24/1990US4920562 Automatic generation of billing records at a telephone paystation
04/24/1990US4920558 Method and apparatus for downloading speech files
03/1990
03/28/1990EP0360493A2 More efficient call handling for operator assistance calls
03/22/1990WO1990003077A1 Improvements in mobile pay telephone system
03/14/1990EP0358408A2 Intelligent network
03/13/1990US4908852 Method and apparatus for altering the access format of telephone calls
03/06/1990US4907257 Public telephone set
02/1990
02/21/1990CN1039942A Multi-exchange transmission system for program-control telephone fee-counting data
02/14/1990CN2052996U Telephone terminal charge device
02/14/1990CN1039691A On-the-site charging system of telephone set
02/13/1990US4901341 Method and apparatus for caller-controlled receipt and delivery of voice messages
02/06/1990US4899375 More efficient call handling for operator assistance calls
01/1990
01/24/1990EP0352177A2 Public telephon set
01/17/1990CN2051422U Flat-rate counter for urban,-long-distance-,domestic-and interrational-telephone subscriber
01/09/1990US4893330 Method and apparatus for restricting credit card communication calls
01/02/1990US4891836 Communication terminal having a charge displaying function
12/1989
12/27/1989EP0348025A1 Line interface unit
12/26/1989US4890317 Automatic validation of telephone account numbers
12/20/1989EP0346897A2 Integrated accounting system
12/19/1989US4888822 Apparatus and method for determining cost of telephone calls
12/05/1989US4885767 Plumbing system
11/1989
11/23/1989EP0342314A2 Anonymous interactive telephone system with expanded outward calling features
11/21/1989CA1263197A1 Portable handsets telephone communication system
11/07/1989US4879742 Charging system in data communication network
10/1989
10/31/1989US4878239 Anonymous interactive telephone system with expanded outward calling features
10/25/1989EP0254743A4 Pay-per-view catv system.
10/10/1989US4873721 Device for starting charging in a pay phone
10/04/1989EP0335768A1 Pre-payment information transmission system
10/04/1989CN2045559U Telephone composite type time number counter
10/03/1989US4872199 Battery-feed circuit for exchange
09/1989
09/26/1989US4870679 Repertory telephone dialer with remote billing capability
09/13/1989EP0332465A2 Concentrator system with polling-response means for detecting failures to stop tariff charges on locally established intraoffice calls
09/12/1989CA1259432A1 Call meter signal receiver for subscriber's private metering of telephone system
08/1989
08/29/1989US4862495 Telecommunications subscriber line interface circuit and party identification facility
08/23/1989EP0329575A1 Band stop filter attenuation compensating circuit for frequencies below the cut-off frequency
07/1989
07/25/1989US4852154 Pay-per-view CATV system
07/18/1989US4850007 Telephone toll service with advertising
07/11/1989US4847890 Anonymous interactive telephone system
06/1989
06/07/1989EP0318648A2 Charge pulse receptor for telecommunication, especially phone connection wires
05/1989
05/17/1989CN2037906U Telephone terminal time counter
05/09/1989US4829517 Circuit arrangement for injecting meter pulses for subscriber tariff counting
04/1989
04/25/1989US4825462 Devices for delivering information on their communications to subscribers of telephone lines
04/25/1989US4825460 Line interface unit for caller-controlled receipt and delivery of voice messages
04/19/1989EP0311607A1 Shared flexible rating of telecommunications calls.
04/18/1989CA1252861A1 Method and apparatus for disallowing the extension of a call through a network
04/05/1989EP0310371A2 Method and apparatus for preventing telephone fraud
03/1989
03/15/1989EP0306520A1 Telephone call monitoring, metering and selection device
03/14/1989US4813065 Computerized telephone accounting system
03/07/1989US4811386 Called party response detecting apparatus
02/1989
02/21/1989CA1250350A1 Signal generator producing pulses with sloping edges
02/15/1989CN2032779U Display for speaking time and timing count
02/08/1989CN1003272B Batlery-feed circuit for exchange
01/1989
01/10/1989US4797910 Automated operator assistance calls with voice processing
12/1988
12/21/1988EP0295533A2 Subscriber connecting circuit
12/20/1988CA1247267A1 Short range radiotelephone system having sets each usable simultaneously by several people
12/13/1988US4791665 In a telephone communication system
12/13/1988US4791640 Call charging arrangement
12/08/1988DE3716141A1 Charge indicator for ISDN switching systems
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