H04M 9/08
Two-way loud-speaking telephone systems with means for conditioning the signal
Official title: Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
H04M9/08 (Two-way loud-speaking telephone systems with means for conditioning the signal) appears on 1,976 US grants and 1,558 published applications in this corpus.
Search patents in H04M- Granted patents
- 1,976
- Published applications
- 1,558
- Assignees
- 637
- Inventors
- 2,954
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 9 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 7 | 0 |
| 1984 | 9 | 0 |
| 1985 | 13 | 0 |
| 1986 | 7 | 0 |
| 1987 | 15 | 0 |
| 1988 | 12 | 0 |
| 1989 | 11 | 0 |
| 1990 | 15 | 0 |
| 1991 | 21 | 0 |
| 1992 | 11 | 0 |
| 1993 | 14 | 0 |
| 1994 | 17 | 0 |
| 1995 | 29 | 0 |
| 1996 | 28 | 0 |
| 1997 | 48 | 0 |
| 1998 | 45 | 0 |
| 1999 | 40 | 0 |
| 2000 | 27 | 0 |
| 2001 | 33 | 8 |
| 2002 | 23 | 35 |
| 2003 | 41 | 45 |
| 2004 | 47 | 54 |
| 2005 | 40 | 54 |
| 2006 | 63 | 64 |
| 2007 | 35 | 65 |
| 2008 | 30 | 82 |
| 2009 | 24 | 74 |
| 2010 | 47 | 81 |
| 2011 | 60 | 53 |
| 2012 | 113 | 57 |
| 2013 | 88 | 78 |
| 2014 | 84 | 82 |
| 2015 | 103 | 85 |
| 2016 | 111 | 69 |
| 2017 | 104 | 68 |
| 2018 | 77 | 65 |
| 2019 | 73 | 76 |
| 2020 | 87 | 74 |
| 2021 | 47 | 56 |
| 2022 | 71 | 50 |
| 2023 | 37 | 64 |
| 2024 | 40 | 54 |
| 2025 | 48 | 41 |
| 2026 | 32 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Speakerphone with room acoustics characterization and related methods6 Oct 2026US 12,756,775 B2
- Wearable device with blocked sensor detection6 Oct 2026US 12,756,983 B2Bose Corporation
- Tone and echo cancellation using two acoustic sound cancellers1 Sep 2026US 12,725,614 B2Sonos, Inc.
- Wearable device with speech enhancement25 Aug 2026US 12,718,830 B2Bose Corporation
- Multi-channel echo cancellation method and related apparatus25 Aug 2026US 12,720,258 B2Tencent Technology (Shenzhen) Company Limited
- Wideband doubletalk detection for optimization of acoustic echo cancellation1 Oct 2026US 2026/0303727 A1Shure Acquisition Holdings, Inc.
- System and method for automatic adjustment of reference gain24 Sep 2026US 2026/0291458 A1Shure Acquisition Holdings, Inc.
- Voice authentication based on background audio3 Sep 2026US 2026/0261614 A1Wells Fargo Bank, N. A.
- Echo suppressor for use in two-way voice communication3 Sep 2026US 2026/0261617 A1GN Hearing A/S
- Systems and methods for integrated conferencing platform30 Jul 2026US 2026/0222494 A1Shure Acquisition Holdings, Inc.
Most cited
By later US patents
- Audio distribution system having programmable zoning features1,660US 5,761,320 AElan Home Systems, L.L.C. · 1998
- Audio distribution system having programmable zoning features1,643US 5,440,644 ASquare D Company · 1995
- Method and apparatus for multi-channel audio processing using single-channel components378US 8,233,632 B1Google Inc. · 2012
- Small array microphone for acoustic echo cancellation and noise suppression373US 7,003,099 B1Fortmedia, Inc. · 2006
- Microphone actuation control system suitable for teleconference systems332US 4,658,425 AShure Brothers, Inc. · 1987