H04L 2012/6475
N-isdn, public switched telephone network [pstn]
Official title: {N-ISDN, Public Switched Telephone Network [PSTN]}
H04L2012/6475 (N-isdn, public switched telephone network [pstn]) appears on 248 US grants and 119 published applications in this corpus.
Search patents in H04L- Granted patents
- 248
- Published applications
- 119
- Assignees
- 106
- Inventors
- 331
- Latest grant
- 16 Nov 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 6 | 0 |
| 1996 | 8 | 0 |
| 1997 | 10 | 0 |
| 1998 | 20 | 0 |
| 1999 | 11 | 0 |
| 2000 | 14 | 0 |
| 2001 | 23 | 11 |
| 2002 | 17 | 21 |
| 2003 | 21 | 12 |
| 2004 | 18 | 10 |
| 2005 | 12 | 9 |
| 2006 | 17 | 6 |
| 2007 | 8 | 5 |
| 2008 | 5 | 8 |
| 2009 | 9 | 6 |
| 2010 | 12 | 7 |
| 2011 | 5 | 5 |
| 2012 | 7 | 0 |
| 2013 | 5 | 4 |
| 2014 | 3 | 3 |
| 2015 | 5 | 5 |
| 2016 | 2 | 4 |
| 2017 | 4 | 2 |
| 2018 | 2 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Connection management service16 Nov 2021US 11,178,068 B1Amazon Technologies, Inc.
- Methods and apparatus to provide messages to television users22 Oct 2019US 10,455,293 B2AT&T Intellectual Property I, L. P.
- Method for completing internet telephony calls1 Jan 2019US 10,171,676 B2AT&T Intellectual Property II, L. P.
- Recovery of established emergency video calls27 Feb 2018US 9,907,096 B2Solacom Technologies Inc.
- Transparent PSTN failover9 Jan 2018US 9,866,429 B2CenturyLink Intellectual Property LLC
- Asymmetrical forward/reverse transmission bandwidth22 Aug 2019US 2019/0260416 A1Signal Trust for Wireless Innovation
- Methods and apparatus to provide messages to television users22 Jun 2017US 2017/0180815 A1AT&T Intellectual Property I, L. P.
- Method for completing internet telephony calls8 Jun 2017US 2017/0163810 A1AT&T Intellectual Property II, L. P.
- Asymmetrical forward/reverse transmission bandwith27 Oct 2016US 2016/0315655 A1Signal Trust for Wireless Innovation
- Recovery of Established Emergency Video Calls15 Sep 2016US 2016/0270128 A1Solacom Technologies Inc.
Most cited
By later US patents
- Access to telecommunications networks in multi-service environment695US 5,610,910 ANorthern Telecom Limited · 1997
- System and method for providing packet data and voice services to mobile subscribers444US 5,793,762 AU S West Technologies, Inc. · 1998
- Network based distributed PBX system407US 5,742,596 APhonet Communication Ltd. · 1998
- Computer-based multifunction personal communications system375US 5,452,289 AMulti-Tech Systems, Inc. · 1995
- Call center system where users and representatives conduct simultaneous voice and joint browsing sessions342US 6,295,551 B1Cisco Technology, Inc. · 2001