H04M 3/20
Automatic or semi-automatic exchanges: with means for interrupting existing connections
Official title: with means for interrupting existing connections; with means for breaking-in on conversations
H04M3/20 (Automatic or semi-automatic exchanges: with means for interrupting existing connections) appears on 265 US grants and 218 published applications in this corpus.
Search patents in H04M- Granted patents
- 265
- Published applications
- 218
- Assignees
- 125
- Inventors
- 460
- Latest grant
- 22 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 2 |
| 2002 | 7 | 9 |
| 2003 | 4 | 3 |
| 2004 | 6 | 11 |
| 2005 | 13 | 15 |
| 2006 | 9 | 11 |
| 2007 | 9 | 8 |
| 2008 | 9 | 12 |
| 2009 | 5 | 11 |
| 2010 | 9 | 9 |
| 2011 | 6 | 3 |
| 2012 | 12 | 6 |
| 2013 | 8 | 10 |
| 2014 | 10 | 13 |
| 2015 | 15 | 9 |
| 2016 | 15 | 16 |
| 2017 | 8 | 14 |
| 2018 | 18 | 11 |
| 2019 | 12 | 13 |
| 2020 | 14 | 13 |
| 2021 | 12 | 5 |
| 2022 | 6 | 4 |
| 2023 | 9 | 5 |
| 2024 | 1 | 2 |
| 2025 | 5 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Connecting a supervisor device to a contact center engagement22 Apr 2025US 12,282,880 B2Zoom Communications, Inc.
- Multi-call management system and method11 Mar 2025US 12,250,342 B1
- Switch controller for separating multiple portions of call25 Feb 2025US 12,238,146 B2Tevnos LLC
- Integration of cellular phone detection and reporting into a prison telephone system14 Jan 2025US 12,199,748 B2Global Tel'Link Corporation
- Real time switching from unsecured to secured signaling channel7 Jan 2025US 12,192,401 B2Avaya Management L.P.
- System and method for call dialing protection with called party authentication16 Apr 2026US 2026/0106933 A1Verizon Patent and Licensing Inc.
- Establishing A Contact Center Session Based On An Updated Sentiment-Based Score3 Jul 2025US 2025/0217751 A1Zoom Communications, Inc.
- Switch controller for separating multiple portions of call15 May 2025US 2025/0159028 A1Tevnos LLC
- Connecting A Supervisor Device To A Contact Center Engagement16 May 2024US 2024/0161043 A1Zoom Video Communications, Inc.
- Integration of cellular phone detection and reporting into a prison telephone system11 Jan 2024US 2024/0014920 A1Global Tel'Link Corporation
Most cited
By later US patents
- Method and apparatus for providing media-independent self-help modules within a multimedia communication-center customer interface195US 6,332,154 B2Genesys Telecommunications Laboratories, Inc. · 2001
- Telecommunication call management and monitoring system186US 7,333,798 B2Value-Added Communications, Inc. · 2008
- Call screening method and apparatus for use in completing telephone calls160US 5,960,064 AAT&T Corp. · 1999
- Method and apparatus for enabling interaction between callers with calls positioned in a queue160US 5,978,467 AWalker Asset Management Limited Partnership · 1999
- Method and system for call screening153US 8,045,689 B2TELECOM ITALIA S p.A. · 2011