H04M 3/568
Audio processing specific to telephonic conferencing
Official title: {audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants (echo suppression in two-way loud-speaking telephone systems H04M9/02; sound field processing per se H04S7/30)}
H04M3/568 (Audio processing specific to telephonic conferencing) appears on 1,482 US grants and 1,474 published applications in this corpus.
Search patents in H04M- Granted patents
- 1,482
- Published applications
- 1,474
- Assignees
- 501
- Inventors
- 2,648
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 9 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 8 | 0 |
| 1983 | 3 | 0 |
| 1984 | 14 | 0 |
| 1985 | 9 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 9 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 12 | 0 |
| 1999 | 9 | 0 |
| 2000 | 6 | 0 |
| 2001 | 11 | 3 |
| 2002 | 8 | 22 |
| 2003 | 11 | 29 |
| 2004 | 16 | 27 |
| 2005 | 22 | 32 |
| 2006 | 14 | 19 |
| 2007 | 17 | 30 |
| 2008 | 14 | 50 |
| 2009 | 18 | 39 |
| 2010 | 22 | 27 |
| 2011 | 31 | 28 |
| 2012 | 43 | 33 |
| 2013 | 50 | 65 |
| 2014 | 55 | 65 |
| 2015 | 75 | 113 |
| 2016 | 91 | 88 |
| 2017 | 106 | 77 |
| 2018 | 79 | 80 |
| 2019 | 88 | 62 |
| 2020 | 84 | 72 |
| 2021 | 76 | 90 |
| 2022 | 72 | 111 |
| 2023 | 109 | 112 |
| 2024 | 78 | 101 |
| 2025 | 82 | 64 |
| 2026 | 43 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Connected devices call exit management6 Oct 2026US 12,756,782 B2Motorola Mobility LLC
- Control device and control method1 Sep 2026US 12,725,612 B2Toyota Jidosha Kabushiki Kaisha
- Media session orchestrator25 Aug 2026US 12,719,939 B1Amazon Technologes, Inc.
- Systems and methods for automatically unmuting conference participants25 Aug 2026US 12,719,988 B2RingCentral, Inc.
- Systems and methods for sound-enhanced meeting platforms25 Aug 2026US 12,720,268 B2The Regents of the University of California
- Electronic device and method for performing audio communication between first space and second space1 Oct 2026US 2026/0299872 A1Realtek Semiconductor Corp.
- Real-time bi-directional language translation using dual language models in conference calls3 Sep 2026US 2026/0260080 A1Twilio Inc.
- Semi-global muting20 Aug 2026US 2026/0246872 A1Ipc Systems, Inc.
- Mixed reality virtual reverberation6 Aug 2026US 2026/0230668 A1Magic Leap, Inc.
- Proximity-based audio conferencing30 Jul 2026US 2026/0219830 A1Koninklijke KPN N. V.
Most cited
By later US patents
- System and methodology for video conferencing and internet chatting in a cocktail party style388US 6,559,863 B1International Business Machines Corporation · 2003
- Participant-controlled conference calling system353US 6,501,739 B1Remoteability, Inc. · 2002
- Microphone actuation control system suitable for teleconference systems332US 4,658,425 AShure Brothers, Inc. · 1987
- Audio mixing309US 8,331,585 B2Google Inc. · 2012
- Name recognition of virtual meeting participants305US 8,781,841 B1Cisco Technology, Inc. · 2014