H04M 3/002
Applications of echo suppressors or cancellers in telephonic connections
Official title: {Applications of echo suppressors or cancellers in telephonic connections (in two-way loud-speaking telephone systems H04M9/08, echo suppressors or cancellers per se H04B3/20)}
H04M3/002 (Applications of echo suppressors or cancellers in telephonic connections) appears on 391 US grants and 304 published applications in this corpus.
Search patents in H04M- Granted patents
- 391
- Published applications
- 304
- Assignees
- 202
- Inventors
- 682
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 11 | 0 |
| 1996 | 13 | 0 |
| 1997 | 10 | 0 |
| 1998 | 15 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 4 |
| 2002 | 4 | 10 |
| 2003 | 2 | 7 |
| 2004 | 11 | 6 |
| 2005 | 7 | 13 |
| 2006 | 19 | 11 |
| 2007 | 12 | 13 |
| 2008 | 7 | 5 |
| 2009 | 5 | 13 |
| 2010 | 14 | 11 |
| 2011 | 10 | 13 |
| 2012 | 13 | 4 |
| 2013 | 17 | 17 |
| 2014 | 20 | 23 |
| 2015 | 23 | 20 |
| 2016 | 20 | 12 |
| 2017 | 17 | 21 |
| 2018 | 17 | 11 |
| 2019 | 19 | 10 |
| 2020 | 13 | 12 |
| 2021 | 10 | 16 |
| 2022 | 13 | 11 |
| 2023 | 8 | 12 |
| 2024 | 8 | 15 |
| 2025 | 11 | 11 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Speakerphone with room acoustics characterization and related methods6 Oct 2026US 12,756,775 B2
- Per frame input estimation for post filter echo suppression4 Aug 2026US 12,700,418 B1Amazon Technologies, Inc.
- Semi-global muting12 May 2026US 12,627,760 B2Ipc Systems, Inc.
- Efficient detection of co-located participant devices in teleconferencing sessions17 Feb 2026US 12,556,655 B2Google Inc.
- Identifying co-located devices within a teleconferencing session25 Nov 2025US 12,481,479 B2Google Inc.
- Semi-global muting20 Aug 2026US 2026/0246872 A1Ipc Systems, Inc.
- Proximity-based audio conferencing30 Jul 2026US 2026/0219830 A1Koninklijke KPN N. V.
- Spatialized voice feedback26 Feb 2026US 2026/0059073 A1Zoom Communications, Inc.
- Power-based noise reduction during a voice call4 Dec 2025US 2025/0372111 A1QUALCOMM Incorporated
- Audio device with sidetone processing4 Dec 2025US 2025/0373723 A1GN Hearing A/S
Most cited
By later US patents
- Computer-based multifunction personal communications system375US 5,452,289 AMulti-Tech Systems, Inc. · 1995
- Method and apparatus for processing an input speech signal during presentation of an output audio signal228US 6,937,977 B2fastmobile, Inc. · 2005
- Voice over data modem with selectable voice compression180US 5,617,423 AMulti-Tech Systems, Inc. · 1997
- Dynamic selection of compression rate for a voice compression algorithm in a voice over data modem170US 5,546,395 AMulti-Tech Systems, Inc. · 1996
- Three-way call detection system164US 5,768,355 AScience Dynamics Corporation · 1998