with direct connection for all subscribers

Industry

CPC
H04Q5/02

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Parent Industries

HELECTRICITY H04Electric communication H04QSELECTING H04Q5/00Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange

Current Industry

H04Q5/02with direct connection for all subscribers

Industries

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Patents Grantslast 30 patents

Information Patent Grant
System and method for completing two calls using analog interface t...
- Patent number 6,539,086
- Issue date Mar 25, 2003
- AT&T Corp.
- Frederick Murray Burg
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for completing a call while at least one call is...
- Patent number 6,427,007
- Issue date Jul 30, 2002
- AT&T Corporation
- Fred M. Burg
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for completing two calls using analog interface t...
- Patent number 6,411,695
- Issue date Jun 25, 2002
- AT&T Corporation
- Frederick Murray Burg
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for provisioning an extra line on demand and for...
- Patent number 6,263,063
- Issue date Jul 17, 2001
- AT&T Corp.
- Pradeep K. Bansal
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Identification of called directory number at multiple directory num...
- Patent number 5,544,235
- Issue date Aug 6, 1996
- AT&T Corp.
- Menachem T. Ardon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Terminal connection device
- Patent number 5,253,289
- Issue date Oct 12, 1993
- Murata Kikai Kabushiki Kaisha
- Masao Tanaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for selectively enabling subscriber device to respond to...
- Patent number 5,142,569
- Issue date Aug 25, 1992
- Data Accessory Corporation
- George W. Peters
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Added main line apparatus
- Patent number 5,140,630
- Issue date Aug 18, 1992
- Light Logic, Ltd.
- James L. Fry
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Selective ringing circuit for a telephone
- Patent number 4,741,024
- Issue date Apr 26, 1988
- Philip J. Del Monte
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Frequency responsive party telephone line selection apparatus and m...
- Patent number 4,701,949
- Issue date Oct 20, 1987
- Keptel, Inc.
- Daniel Lynch
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface for connecting standard telephones to party lines
- Patent number 4,645,877
- Issue date Feb 24, 1987
- Harris Corporation
- Leonard E. Curtin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface for connecting standard telephones to party lines
- Patent number 4,587,380
- Issue date May 6, 1986
- Harris Corporation
- Leonard E. Curtin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface for connecting standard telephones to party lines
- Patent number 4,567,330
- Issue date Jan 28, 1986
- Harris Corporation
- Leonard E. Curtin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ring scheduling apparatus for a digital multiplexed telecommunicati...
- Patent number 4,406,004
- Issue date Sep 20, 1983
- Anaconda-Ericsson, Inc.
- Jay D. Hall
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Bridge lifter circuit
- Patent number 4,371,755
- Issue date Feb 1, 1983
- Bell Telephone Laboratories, Incorporated
- Stephen J. Brolin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Bridge lifter module
- Patent number 4,371,756
- Issue date Feb 1, 1983
- Porta Systems Corp.
- Michael C. Fasano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Loop sharing in digital systems
- Patent number 4,368,358
- Issue date Jan 11, 1983
- L. M. Ericsson Pty. Ltd.
- Ludwik Herschtal
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Party line telephone system
- Patent number 4,258,230
- Issue date Mar 24, 1981
- Mine Safety Appliances Company
- Herbert Heller
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Control circuit for telephone subscriber station
- Patent number 4,221,935
- Issue date Sep 9, 1980
- International Standard Electric Corporation
- John A. Barsellotti
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system comprising only one control lead per outside line
- Patent number 4,168,403
- Issue date Sep 18, 1979
- Nippon Electric Co., Ltd.
- Mamoru Senzai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Miniature bridge lifter for telephone lines
- Patent number 4,166,931
- Issue date Sep 4, 1979
- Bell Telephone Laboratories, Incorporated
- William F. MacPherson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone isolation device
- Patent number 4,109,112
- Issue date Aug 22, 1978
- Del-Tronics Associates, Inc.
- Donald E. Denman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone ringing detectors
- Patent number 4,056,694
- Issue date Nov 1, 1977
- Bell Telephone Laboratories, Incorporated
- Stephen Joseph Brolin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiparty telephone ringing
- Patent number 4,048,448
- Issue date Sep 13, 1977
- Bell Telephone Laboratories, Incorporated
- Ronald Jay Canniff
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone ringer isolator
- Patent number 4,021,617
- Issue date May 3, 1977
- Bell Telephone Laboratories, Incorporated
- Charles Elmer Jones
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Switching arrangement for telecommunications systems
- Patent number 3,974,342
- Issue date Aug 10, 1976
- Siemens Aktiengesellschaft
- Karl Wagner
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3919487
- Patent number 3,919,487
- Issue date Nov 11, 1975
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3916111
- Patent number 3,916,111
- Issue date Oct 28, 1975
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3881068
- Patent number 3,881,068
- Issue date Apr 29, 1975
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3840703
- Patent number 3,840,703
- Issue date Oct 8, 1974
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
System and method for completing two calls using analog interface t...
- Publication number 20020067819
- Publication date Jun 6, 2002
- Frederick Murray Burg
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

with direct connection for all subscribers

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

System and method for completing two calls using analog interface t...

System and method for completing a call while at least one call is...

System and method for completing two calls using analog interface t...

System and method for provisioning an extra line on demand and for...

Identification of called directory number at multiple directory num...

Terminal connection device

Apparatus for selectively enabling subscriber device to respond to...

Added main line apparatus

Selective ringing circuit for a telephone

Frequency responsive party telephone line selection apparatus and m...

Interface for connecting standard telephones to party lines

Interface for connecting standard telephones to party lines

Interface for connecting standard telephones to party lines

Ring scheduling apparatus for a digital multiplexed telecommunicati...

Bridge lifter circuit

Bridge lifter module

Loop sharing in digital systems

Party line telephone system

Control circuit for telephone subscriber station

Key telephone system comprising only one control lead per outside line

Miniature bridge lifter for telephone lines

Telephone isolation device

Telephone ringing detectors

Multiparty telephone ringing

Telephone ringer isolator

Switching arrangement for telecommunications systems

3919487

3916111

3881068

3840703

Patents Applicationslast 30 patents

System and method for completing two calls using analog interface t...