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H04Q2213/22

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HELECTRICITY H04Electric communication H04QSELECTING H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems

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H04Q2213/22PBX

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Patents Grantslast 30 patents

Information Patent Grant
Digital telephone switching system having plural terminal devices d...
- Patent number 5,719,855
- Issue date Feb 17, 1998
- Hitachi Telecom Technologies, Ltd.
- Tatsuhiko Ando
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data terminal control unit including table for efficiently making c...
- Patent number 5,457,693
- Issue date Oct 10, 1995
- Sharp Kabushiki Kaisha
- Satoyuki Sasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system and a private branch exchange to be used in su...
- Patent number 5,450,396
- Issue date Sep 12, 1995
- U.S. Philips Corporation
- Gerardus M. J. Havermans
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ISDN-to-ISDN communication via satellite microwave radio frequency...
- Patent number 5,412,660
- Issue date May 2, 1995
- Trimble Navigation Limited
- David T. Chen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Subscriber module for connection to a plurality of subscriber termi...
- Patent number 5,404,491
- Issue date Apr 4, 1995
- Alcatel N.V.
- Richard Huzenlaub
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Homebus system for permitting homebus equipment and ISDN basic inte...
- Patent number 5,379,441
- Issue date Jan 3, 1995
- Matsushita Electric Industrial Co., Ltd.
- Kazuhiro Watanabe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiple communication speed converting apparatus
- Patent number 5,369,636
- Issue date Nov 29, 1994
- NEC Corporation
- Chikako Ueno
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Terminal adapter pooling system for ISDN
- Patent number 5,319,700
- Issue date Jun 7, 1994
- Kabushiki Kaisha Toshiba
- Hiroshi Mano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system for converting ISDN signaling protocol between...
- Patent number 5,278,972
- Issue date Jan 11, 1994
- AT&T Bell Laboratories
- Albert D. Baker
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ISDN network termination unit enabling to establish data link betwe...
- Patent number 4,999,836
- Issue date Mar 12, 1991
- NEC Corporation
- Ryuhei Fujiwara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ISDN dual bus extension phone system
- Patent number 4,998,274
- Issue date Mar 5, 1991
- Bell Communications Research, Inc.
- Robert M. Ephraim
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive bus communication using alternate CRC
- Patent number 4,891,813
- Issue date Jan 2, 1990
- Racal Data Communications Inc.
- Rafael E. Salcedo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive bus communication for ISDN
- Patent number 4,835,769
- Issue date May 30, 1989
- Racal Data Communications Inc.
- Norman J. Donaghue
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Local communication system among ISDN terminal equipments
- Patent number 4,792,800
- Issue date Dec 20, 1988
- Kobusai Denshin Denwa Co., Ltd.
- Masanobu Fujioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ISDN subscriber terminal control system
- Patent number 4,722,082
- Issue date Jan 26, 1988
- Kokusai Denshin Denwa Co., Ltd.
- Nobuo Furuya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Digital telephone switching system having plural terminal devices d...

Data terminal control unit including table for efficiently making c...

Communication system and a private branch exchange to be used in su...

ISDN-to-ISDN communication via satellite microwave radio frequency...

Subscriber module for connection to a plurality of subscriber termi...

Homebus system for permitting homebus equipment and ISDN basic inte...

Multiple communication speed converting apparatus

Terminal adapter pooling system for ISDN

Communication system for converting ISDN signaling protocol between...

ISDN network termination unit enabling to establish data link betwe...

ISDN dual bus extension phone system

Passive bus communication using alternate CRC

Passive bus communication for ISDN

Local communication system among ISDN terminal equipments

ISDN subscriber terminal control system

Patents Applicationslast 30 patents