H04Q 2213/13383
Hierarchy of switches, main and subexchange
Official title: Hierarchy of switches, main and subexchange, e.g. satellite exchange
H04Q2213/13383 (Hierarchy of switches, main and subexchange) appears on 227 US grants and 115 published applications in this corpus.
Search patents in H04Q- Granted patents
- 227
- Published applications
- 115
- Assignees
- 101
- Inventors
- 431
- Latest grant
- 21 Feb 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 14 | 0 |
| 1998 | 18 | 0 |
| 1999 | 20 | 0 |
| 2000 | 13 | 0 |
| 2001 | 19 | 5 |
| 2002 | 11 | 19 |
| 2003 | 11 | 14 |
| 2004 | 9 | 15 |
| 2005 | 11 | 12 |
| 2006 | 11 | 10 |
| 2007 | 15 | 11 |
| 2008 | 9 | 3 |
| 2009 | 13 | 8 |
| 2010 | 12 | 0 |
| 2011 | 4 | 1 |
| 2012 | 4 | 3 |
| 2013 | 2 | 6 |
| 2014 | 9 | 3 |
| 2015 | 1 | 1 |
| 2016 | 2 | 1 |
| 2017 | 3 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- End-to-end circuit stitching21 Feb 2023US 11,588,553 B2Fujitsu Limited
- Method and system for controlling communication network and router used in the network20 Mar 2018US 9,924,411 B2NEC Corporation
- Regional independent tandem telephone switch24 Oct 2017US 9,800,956 B2Level 3 Communications, LLC
- Methods of assigning, recording and using a location routing number30 May 2017US 9,667,802 B2
- Regional independent tandem telephone switch25 Apr 2017US 9,634,941 B2Level 3 Communications, LLC
- Devices for interconnecting nodes in a direct interconnect network18 Jan 2024US 2024/0022327 A1Rockport Networks Inc.
- End-to-end circuit stitching10 Nov 2022US 2022/0360335 A1Fujitsu Limited
- Regional independent tandem telephone switch10 Aug 2017US 2017/0230732 A1Level 3 Communications, LLC
- Regional independent tandem telephone switch17 Mar 2016US 2016/0080270 A1Level 3 Communications, LLC
- System And Method For Resource Usage, Performance And Expenditure Comparison22 Jan 2015US 2015/0024707 A1
Most cited
By later US patents
- Unified messaging system and method1,307US 5,608,786 AAlphanet Telecom Inc. · 1997
- Cable connected wan interconnectivity services for corporate telecommuters702US 6,452,923 B1AT&T Corp. · 2002
- System for selective communication connection based on transaction pricing signals599US 5,802,502 ABritish Telecommunications Public Ltd.Co. · 1998
- Telecommunications network234US 5,923,659 ABell Atlantic Network Services, Inc. · 1999
- Method of multicast message distribution207US 4,864,559 ADigital Equipment Corporation · 1989