H04Q 2213/13286
Direct in-dialling in pbx, ddi
Official title: Direct in-dialling in PBX, DDI
H04Q2213/13286 (Direct in-dialling in pbx, ddi) appears on 73 US grants and 24 published applications in this corpus.
Search patents in H04Q- Granted patents
- 73
- Published applications
- 24
- Assignees
- 37
- Inventors
- 73
- Latest grant
- 29 Nov 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 9 | 0 |
| 1999 | 8 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 4 |
| 2002 | 4 | 1 |
| 2003 | 3 | 3 |
| 2004 | 2 | 0 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 7 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 2 | 1 |
| 2011 | 4 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Nurse call system29 Nov 2022US 11,515,034 B2Aiphone Co., Ltd.
- Method and system for managing internal and external calls for a group of communication clients sharing a common customer identifier1 Jan 2019US 10,171,889 B2Bce Inc.
- Operating a network node24 Oct 2017US 9,800,957 B2Metaswitch Networks Ltd.
- Telephone exchange system, dial-in incoming call method thereof, and dial-in incoming call program thereof20 May 2014US 8,731,173 B2NEC Infrontia Corporation
- Method and apparatus for providing reliable path for direct inward dial calls11 Feb 2014US 8,649,497 B1AT&T Intellectual Property II, L. P.
- Nurse call system13 Aug 2020US 2020/0258619 A1Aiphone Co., Ltd.
- Operating a network node23 Feb 2017US 2017/0055047 A1Metaswitch Networks Ltd.
- Telephone exchange system, dial-in incoming call method thereof, and dial-in incoming call program thereof29 Nov 2012US 2012/0300919 A1NEC Infrontia Corporation
- Methods and Systems for Communications24 Nov 2011US 2011/0286385 A1
- Method and system for managing internal and external calls for a group of communication clients sharing a common customer identifier2 Sep 2010US 2010/0220714 A1Bce Inc.
Most cited
By later US patents
- Message storage and delivery system854US 5,675,507 A1997
- Systems and methods for storing, delivering, and managing messages422US 5,870,549 A1999
- Telephone control system with branch routing343US 5,375,161 AAccessLine Technologies, Inc. · 1994
- Anonymous interactive telephone system276US 5,361,295 AThe Telephone Connection · 1994
- Systems and methods for storing, delivering, and managing messages243US 6,350,066 B12002