Lock-out or secrecy arrangements in party-line systems

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CPC
H04M1/70

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HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M1/00Substation equipment

Current Industry

H04M1/70Lock-out or secrecy arrangements in party-line systems

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Patents Grantslast 30 patents

Information Patent Grant
Cellular device security apparatus and method
- Patent number 9,642,002
- Issue date May 2, 2017
- Rafi Nehushtan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cellular device security apparatus and method
- Patent number 9,635,544
- Issue date Apr 25, 2017
- Rafi Nehushtan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cellular device security apparatus and method
- Patent number 8,737,963
- Issue date May 27, 2014
- Rafi Nehushtan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cellular device security apparatus and method
- Patent number 8,548,429
- Issue date Oct 1, 2013
- Rafi Nehushtan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Changing a state of a remote switch box which connects a phone to a...
- Patent number 8,265,249
- Issue date Sep 11, 2012
- International Business Machines Corporation
- James Edward Bostick
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone bill reducer
- Patent number 7,483,531
- Issue date Jan 27, 2009
- Cuthbert Gordon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone circuit controller apparatus
- Patent number 6,980,634
- Issue date Dec 27, 2005
- James R Davis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Arrangement for improving a telephone system
- Patent number 6,411,694
- Issue date Jun 25, 2002
- Telefonaktiebolaget LM Ericsson
- Johan P. Steller
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method of recognizing establishment of speech channel...
- Patent number 5,926,523
- Issue date Jul 20, 1999
- Samsung Electronics Co., Ltd.
- Seung-Young Choi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Parallel-connected telephone use determining circuit in a cordless...
- Patent number 5,727,056
- Issue date Mar 10, 1998
- SamSung Electronics Co., Ltd.
- Byeong-Kuk Lee
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone privacy device with conference and indicator features
- Patent number 5,559,873
- Issue date Sep 24, 1996
- Notify Corporation
- Samuel F. Wood
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone line lockout device
- Patent number 5,444,772
- Issue date Aug 22, 1995
- Elzie L. Coker
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone privacy device
- Patent number 5,231,658
- Issue date Jul 27, 1993
- Vakis Eftechiou
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Party line converter
- Patent number 4,985,916
- Issue date Jan 15, 1991
- Trison Telecommunications Ltd.
- Leo Tachuk
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Muting circuit for telephone answering machine
- Patent number 4,941,166
- Issue date Jul 10, 1990
- Herbert H. Waldman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multi use telephone extension control circuit and device providing...
- Patent number 4,899,372
- Issue date Feb 6, 1990
- Better Communications, Inc.
- Ashok L. Wahi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Exclusionary device for coupling plural telephonic devices to a sin...
- Patent number 4,825,465
- Issue date Apr 25, 1989
- Telecommunication Concepts, Inc.
- Donald J. Ryan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone line exclusion device
- Patent number 4,809,317
- Issue date Feb 28, 1989
- Paul R. Howe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telecommunication controller having a telephone line sharing function
- Patent number 4,807,278
- Issue date Feb 21, 1989
- David W. Ross
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automatic telephone line sharing and lockout apparatus
- Patent number 4,805,210
- Issue date Feb 14, 1989
- Herbert L. Griffith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone privacy protector
- Patent number 4,747,128
- Issue date May 24, 1988
- Kwok-Leung Chan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone privacy circuit
- Patent number 4,726,048
- Issue date Feb 16, 1988
- Herbert H. Waldman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Line use indicator in a telephone set
- Patent number 4,723,279
- Issue date Feb 2, 1988
- Northern Telecom Limited
- Ronald G. Field
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Distributed privacy oriented telephone extension system
- Patent number 4,703,499
- Issue date Oct 27, 1987
- Arturo Fossas
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Circuit for detection of off-hook condition of extension telephones
- Patent number 4,647,723
- Issue date Mar 3, 1987
- GTE Communications Systems Corp.
- Kenny R. Voorhies
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiparty line adapter with privacy feature controlled by reversal...
- Patent number 4,528,424
- Issue date Jul 9, 1985
- International Telephone & Telegraph Corporation
- Francisco A. Middleton
- 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
Telephone privacy controller
- Patent number 4,332,983
- Issue date Jun 1, 1982
- Hosein Vakili
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Partyline subscriber interface circuit
- Patent number 4,219,700
- Issue date Aug 26, 1980
- Mitel Corporation
- Guido Panizzon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system having automatic exclusion circuit for line pr...
- Patent number 4,218,590
- Issue date Aug 19, 1980
- Crest Industries, Inc.
- Harry R. Rasmussen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CELLULAR DEVICE SECURITY APPARATUS AND METHOD
- Publication number 20140256289
- Publication date Sep 11, 2014
- Rafi NEHUSHTAN
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CELLULAR DEVICE SECURITY APPARATUS AND METHOD
- Publication number 20140031013
- Publication date Jan 30, 2014
- Rafi NEHUSHTAN
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CHANGING A STATE OF A REMOTE SWITCH BOX WHICH CONNECTS A PHONE TO A...
- Publication number 20090028311
- Publication date Jan 29, 2009
- James Edward Bostick
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD AND APPARATUS FOR CALL PROTECTION OVER A TELEPHONE SYSTEM
- Publication number 20080254762
- Publication date Oct 16, 2008
- General Instrument Corporation
- Jacob Igval
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Cellular device security apparatus and method
- Publication number 20050197099
- Publication date Sep 8, 2005
- Lan-Ver Technologies Solutions Ltd.
- Rafi Nehushtan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Lock-out or secrecy arrangements in party-line systems

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Cellular device security apparatus and method

Cellular device security apparatus and method

Cellular device security apparatus and method

Cellular device security apparatus and method

Changing a state of a remote switch box which connects a phone to a...

Telephone bill reducer

Telephone circuit controller apparatus

Arrangement for improving a telephone system

Apparatus and method of recognizing establishment of speech channel...

Parallel-connected telephone use determining circuit in a cordless...

Telephone privacy device with conference and indicator features

Telephone line lockout device

Telephone privacy device

Party line converter

Muting circuit for telephone answering machine

Multi use telephone extension control circuit and device providing...

Exclusionary device for coupling plural telephonic devices to a sin...

Telephone line exclusion device

Telecommunication controller having a telephone line sharing function

Automatic telephone line sharing and lockout apparatus

Telephone privacy protector

Telephone privacy circuit

Line use indicator in a telephone set

Distributed privacy oriented telephone extension system

Circuit for detection of off-hook condition of extension telephones

Multiparty line adapter with privacy feature controlled by reversal...

Loop sharing in digital systems

Telephone privacy controller

Partyline subscriber interface circuit

Key telephone system having automatic exclusion circuit for line pr...

Patents Applicationslast 30 patents

CELLULAR DEVICE SECURITY APPARATUS AND METHOD

CELLULAR DEVICE SECURITY APPARATUS AND METHOD

CHANGING A STATE OF A REMOTE SWITCH BOX WHICH CONNECTS A PHONE TO A...

METHOD AND APPARATUS FOR CALL PROTECTION OVER A TELEPHONE SYSTEM

Cellular device security apparatus and method