H04M 7/12
Arrangements for interconnection between switching centres: for working between exchanges having different
Official title: for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
H04M7/12 (Arrangements for interconnection between switching centres: for working between exchanges having different) appears on 3,748 US grants and 3,232 published applications in this corpus.
Search patents in H04M- Granted patents
- 3,748
- Published applications
- 3,232
- Assignees
- 1,091
- Inventors
- 5,959
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 14 | 0 |
| 1997 | 25 | 0 |
| 1998 | 65 | 0 |
| 1999 | 121 | 0 |
| 2000 | 126 | 0 |
| 2001 | 166 | 83 |
| 2002 | 167 | 267 |
| 2003 | 153 | 246 |
| 2004 | 213 | 233 |
| 2005 | 147 | 224 |
| 2006 | 215 | 246 |
| 2007 | 167 | 251 |
| 2008 | 167 | 226 |
| 2009 | 152 | 163 |
| 2010 | 193 | 171 |
| 2011 | 170 | 141 |
| 2012 | 225 | 123 |
| 2013 | 207 | 124 |
| 2014 | 213 | 116 |
| 2015 | 162 | 128 |
| 2016 | 140 | 117 |
| 2017 | 103 | 76 |
| 2018 | 82 | 60 |
| 2019 | 88 | 45 |
| 2020 | 68 | 49 |
| 2021 | 45 | 40 |
| 2022 | 43 | 30 |
| 2023 | 31 | 31 |
| 2024 | 40 | 23 |
| 2025 | 21 | 10 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dynamic direction of incoming calls29 Sep 2026US 12,750,442 B18x8, Inc.
- Exchange, and telephone exchange method25 Aug 2026US 12,719,983 B2NEC Platforms, Ltd.
- Remote control of a web browser30 Jun 2026US 12,671,762 B2
- Compute systems and processes for video messages16 Jun 2026US 12,659,408 B2Let's Roll Marketing LLC.
- Call transferring by detecting the presence of a terminal in a local network16 Jun 2026US 12,659,409 B2Orange
- Call classification through analysis of dtmf events17 Sep 2026US 2026/0281227 A1Pindrop Security, Inc.
- Compute systems and processes for video messages10 Sep 2026US 2026/0270347 A1Let's Roll Marketing LLC.
- Gets call pin sharing via ims data channel13 Aug 2026US 2026/0238687 A1T-Mobile USA, Inc.
- Gets call pin sharing via ims data channel13 Aug 2026US 2026/0238721 A1T-Mobile USA, Inc.
- Systems and Methods for Automated Call Acceptance of Facility-Originated Telephone Calls with Prerecorded Preambles26 Mar 2026US 2026/0089257 A1
Most cited
By later US patents
- Personal communications internetworking1,899US 5,742,905 ABell Communications Research, Inc. · 1998
- Unified messaging system and method1,307US 5,608,786 AAlphanet Telecom Inc. · 1997
- System, method and article of manufacture for communications utilizing calling, plans in a hybrid network1,175US 5,867,495 AMCI Communications Corporations · 1999
- Distributed system to intelligently establish sessions between anonymous users over various networks1,052US 6,564,261 B1Telefonaktiebolaget LM Ericsson (publ) · 2003
- System for coordinating communications via customer contact channel changing system using call centre for setting up the call between customer and an available help agent953US 5,884,032 AThe New Brunswick Telephone Company, Limited · 1999