H04Q 11/0442
Exchange access circuits
Official title: {Exchange access circuits}
H04Q11/0442 (Exchange access circuits) appears on 80 US grants and 31 published applications in this corpus.
Search patents in H04Q- Granted patents
- 80
- Published applications
- 31
- Assignees
- 54
- Inventors
- 172
- Latest grant
- 26 Feb 2013
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 5 |
| 2002 | 8 | 8 |
| 2003 | 1 | 3 |
| 2004 | 6 | 6 |
| 2005 | 6 | 1 |
| 2006 | 5 | 1 |
| 2007 | 2 | 1 |
| 2008 | 4 | 2 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 2 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and broadband access system for remote-controlling a voice interface of an access node26 Feb 2013US 8,386,591 B2Deutsche Telekom AG
- Communication circuitry, devices and methods27 Mar 2012US 8,144,861 B2Lantiq Deutschland GmbH
- Line terminal for determining operational status of a U interface2 Aug 2011US 7,991,015 B2Hon Hai Preciasion Industry Co., Ltd.
- Method for switching active calls17 May 2011US 7,945,042 B1Cisco Technology, Inc.
- Mechanism for efficient endpoint discriminator allocation for APS protected MLPPP bundles on distributed routing systems21 Sep 2010US 7,801,023 B2Alcatel Lucent
- Optical Network and Node Using Timeslotted Reception14 Mar 2024US 2024/0089641 A1Nippon Telegraph and Telephone Corporation
- Method and broadband access system for remote-controlling a voice interface of an access node25 Mar 2010US 2010/0074250 A1Deutsche Telekom AG
- Mechanism for efficient endpoint discriminator allocation for APS protected MLPPP bundles on distributed routing systems26 Mar 2009US 2009/0080446 A1Alcatel Lucent
- Line terminal for determining operational status of a u interface5 Mar 2009US 2009/0059963 A1Hon Hai Precision Industry Co., Ltd.
- Managing a Node that Provides Access to Both Broadband and Narrowband Service13 Nov 2008US 2008/0279180 A1
Most cited
By later US patents
- Base transceiver station and subscriber unit in wireless local loop system using personal handy-phone system and method for operating same117US 6,175,747 B1Fujitsu Limited · 2001
- Digital subscriber loop access circuit for digital switch and packet network interconnections92US 6,081,517 AIntegrated Telecom Express · 2000
- Access to telecommunications networks in a multi-service environment by mapping and exchanging control message between CPE adaptors and access server69US 5,954,799 ANorthern Telecom Limited · 1999
- Multiple ISDN and pots carrier system58US 6,141,330 AGoDigital Networks Corporation · 2000
- ISDN, basic rate interface arranged for quad voice41US 4,970,723 AAT&T Bell Laboratories · 1990