Multiplex systems

Industry

CPC
H04M9/008

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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M9/00Interconnection arrangements not involving centralised switching

Current Industry

H04M9/008Multiplex systems

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Digital key telephone connecting apparatus and method in a digital...
- Patent number 5,761,287
- Issue date Jun 2, 1998
- Samsung Electronics Co., Ltd.
- Yang-Sun Kim
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital exchange system with function of displaying operation state...
- Patent number 5,737,390
- Issue date Apr 7, 1998
- Kabushiki Kaisha Toshiba
- Hiroshi Mano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
PC with telephony exchange function
- Patent number 5,649,005
- Issue date Jul 15, 1997
- Northern Telecom Limited
- John Cornelius Lynch
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital sound level control apparatus
- Patent number 5,495,529
- Issue date Feb 27, 1996
- NEC Corporation
- Toshio Honda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Conferencing system for distributed switching network
- Patent number 5,379,280
- Issue date Jan 3, 1995
- IPC Information Systems, Inc.
- John M. Cotton
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Arbitrary selecting of a terminal to be called in key telephone sys...
- Patent number 5,333,182
- Issue date Jul 26, 1994
- Kabushiki Kaisha Toshiba
- Takashi Aoki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone system
- Patent number 5,303,239
- Issue date Apr 12, 1994
- Kabushiki Kaisha Toshiba
- Takashi Aoki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system with reduction of delay of ring tone generatio...
- Patent number 5,260,992
- Issue date Nov 9, 1993
- NEC Corporation
- Koichiro Kashiwagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system provided with telephone sets connectable to ad...
- Patent number 5,224,159
- Issue date Jun 29, 1993
- Kabushiki Kaisha Toshiba
- Isaku Komuro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system with enhanced connectivity
- Patent number 5,204,861
- Issue date Apr 20, 1993
- Northern Telecom Limited
- Charles R. Wiebe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data error detecting apparatus for key telephone system and the det...
- Patent number 5,187,705
- Issue date Feb 16, 1993
- Kabushiki Kaisha Toshiba
- Hiroshi Mano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone apparatus
- Patent number 5,151,934
- Issue date Sep 29, 1992
- Matsushita Electric Industrial Co., Ltd.
- Takashi Hayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital key telephone system
- Patent number 5,136,585
- Issue date Aug 4, 1992
- Northern Telecom Limited
- Nadir Nizamuddin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system with circuitry for adding a third caller to a...
- Patent number 5,128,989
- Issue date Jul 7, 1992
- Matsushita Electric Industrial Co., Ltd.
- Yoshio Nomura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Private telephone system with unified command feature
- Patent number 5,073,923
- Issue date Dec 17, 1991
- Northern Telecom Limited
- Albert G. Offers
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone system
- Patent number 5,070,524
- Issue date Dec 3, 1991
- Kabushiki Kaisha Toshiba
- Hiroshi Mano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital key telephone system
- Patent number 5,027,345
- Issue date Jun 25, 1991
- Northern Telecom Limited
- Timothy J. Littlewood
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system
- Patent number 5,025,441
- Issue date Jun 18, 1991
- Iwatsu Electric Company, Ltd.
- Masaharu Kamigaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital key telephone system
- Patent number 4,893,310
- Issue date Jan 9, 1990
- Northern Telecom Limited
- David J. Robertson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time division multiplex data transmission method and apparatus
- Patent number 4,805,165
- Issue date Feb 14, 1989
- Iwatsu Electric Co., Ltd.
- Masataka Kawamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Analog telephone circuit for digital telephone system
- Patent number 4,759,059
- Issue date Jul 19, 1988
- Larry B. Christensen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time division multiplex telecommunications system and method for a...
- Patent number 4,726,013
- Issue date Feb 16, 1988
- Iwatsu Electric Co., Ltd.
- Masayuki Kawashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal multiplexing circuit
- Patent number 4,646,289
- Issue date Feb 24, 1987
- Northern Telecom Limited
- Nicholas Tsiakas
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone network including common equipment with message informati...
- Patent number 4,363,936
- Issue date Dec 14, 1982
- Stromberg-Carlson Corporation
- Ronald W. Christain
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Control circuit for concurrently monitoring and controlling functio...
- Patent number 4,334,126
- Issue date Jun 8, 1982
- Stromberg-Carlson Corporation
- Barry Slingsby
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multifunction telephone with message information and control inform...
- Patent number 4,322,581
- Issue date Mar 30, 1982
- Stromberg-Carlson Corporation
- Ronald W. Christain
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal multiplexing circuit
- Patent number 4,178,480
- Issue date Dec 11, 1979
- Bell Telephone Laboratories, Incorporated
- Robert L. Carbrey
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal multiplexing circuit
- Patent number 4,171,467
- Issue date Oct 16, 1979
- Bell Telephone Laboratories, Incorporated
- Leonard N. Evenchik
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electronic key telephone system
- Patent number 4,160,131
- Issue date Jul 3, 1979
- Nippon Electric Company, Ltd.
- Pradeep P. Kaul
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Line circuit for telecommunications exchange using TDM
- Patent number 3,997,738
- Issue date Dec 14, 1976
- International Telephone & Telegraph Corporation
- Viacheslav Korsky
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION ADAPTER
- Publication number 20180316798
- Publication date Nov 1, 2018
- Panasonic Intellectual Property Management Co., Ltd.
- Ikko FUJIMURA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Multiplex systems

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Digital key telephone connecting apparatus and method in a digital...

Digital exchange system with function of displaying operation state...

PC with telephony exchange function

Digital sound level control apparatus

Conferencing system for distributed switching network

Arbitrary selecting of a terminal to be called in key telephone sys...

Telephone system

Key telephone system with reduction of delay of ring tone generatio...

Key telephone system provided with telephone sets connectable to ad...

Key telephone system with enhanced connectivity

Data error detecting apparatus for key telephone system and the det...

Key telephone apparatus

Digital key telephone system

Key telephone system with circuitry for adding a third caller to a...

Private telephone system with unified command feature

Telephone system

Digital key telephone system

Key telephone system

Digital key telephone system

Time division multiplex data transmission method and apparatus

Analog telephone circuit for digital telephone system

Time division multiplex telecommunications system and method for a...

Signal multiplexing circuit

Telephone network including common equipment with message informati...

Control circuit for concurrently monitoring and controlling functio...

Multifunction telephone with message information and control inform...

Signal multiplexing circuit

Signal multiplexing circuit

Electronic key telephone system

Line circuit for telecommunications exchange using TDM

Patents Applicationslast 30 patents

COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION ADAPTER