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H04M9/022
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Parent Industries
H
ELECTRICITY
H04
Electric communication
H04M
TELEPHONIC COMMUNICATION
H04M9/00
Interconnection arrangements not involving centralised switching
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H04M9/022
Multiplex systems
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Patents Grants
last 30 patents
Information
Patent Grant
Telephone adapter and telephone system providing multiple telephone...
Patent number
6,453,040
Issue date
Sep 17, 2002
Motorola, Inc.
Timothy M. Burke
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Subscriber line multiplexer
Patent number
6,212,204
Issue date
Apr 3, 2001
Clayton S. Depue
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication network integrating voice data and video with distrib...
Patent number
5,341,374
Issue date
Aug 23, 1994
TriLAN Systems Corporation
Ronald C. Lewen
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and system for data transmission
Patent number
4,855,995
Issue date
Aug 8, 1989
Hitachi, Ltd.
Kunio Hiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical local area network using a common optical carrier with sepa...
Patent number
4,754,452
Issue date
Jun 28, 1988
American Telephone and Telegraph Company, AT&T Bell Laboratories
Paul S. Henry
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Broad band network system
Patent number
4,564,940
Issue date
Jan 14, 1986
Tokyo Shibaura Denki Kabushiki Kaisha
Haruki Yahata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Private branch exchange having transmission channels commonly avail...
Patent number
4,545,049
Issue date
Oct 1, 1985
U.S. Philips Corporation
Walter Kammerer
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Key telephone system using time division and space division control
Patent number
3,935,396
Issue date
Jan 27, 1976
International Standard Electric Corporation
John A. Barsellotti
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
3751595
Patent number
3,751,595
Issue date
Aug 7, 1973
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
3647976
Patent number
3,647,976
Issue date
Mar 7, 1972
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Digital subscriber line multiplexer
Publication number
20010008534
Publication date
Jul 19, 2001
Clayton S. Depue
H04 - ELECTRIC COMMUNICATION TECHNIQUE