H04R 3/12
Circuits for transducers: for distributing signals to two or more loudspeakers
Official title: for distributing signals to two or more loudspeakers {(specially adapted for hearing aids H04R25/407)}
H04R3/12 (Circuits for transducers: for distributing signals to two or more loudspeakers) appears on 3,964 US grants and 4,756 published applications in this corpus.
Search patents in H04R- Granted patents
- 3,964
- Published applications
- 4,756
- Assignees
- 1,061
- Inventors
- 6,794
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 4 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 11 | 0 |
| 1993 | 8 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 14 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 4 |
| 2002 | 7 | 15 |
| 2003 | 8 | 13 |
| 2004 | 18 | 25 |
| 2005 | 7 | 42 |
| 2006 | 16 | 49 |
| 2007 | 16 | 60 |
| 2008 | 18 | 47 |
| 2009 | 18 | 49 |
| 2010 | 22 | 56 |
| 2011 | 43 | 51 |
| 2012 | 61 | 71 |
| 2013 | 57 | 148 |
| 2014 | 61 | 110 |
| 2015 | 126 | 166 |
| 2016 | 164 | 228 |
| 2017 | 238 | 321 |
| 2018 | 309 | 348 |
| 2019 | 379 | 364 |
| 2020 | 403 | 401 |
| 2021 | 344 | 395 |
| 2022 | 318 | 387 |
| 2023 | 327 | 401 |
| 2024 | 341 | 371 |
| 2025 | 317 | 360 |
| 2026 | 176 | 274 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device and method for expanding 7-channel audio by using radio transmission6 Oct 2026US 12,756,977 B2Samsung Electronics Co., Ltd.
- Sound bar system, sound bar, controller, program, and method for setting sound bar6 Oct 2026US 12,756,979 B2D&M Holdings, Inc.
- Information presentation device29 Sep 2026US 12,749,351 B2Subaru Corporation
- Distributed generative models29 Sep 2026US 12,750,620 B2Sonos, Inc.
- Coordination of audio devices29 Sep 2026US 12,750,621 B2Dolby International AB
- Virtual sound sources and rendering techniques8 Oct 2026US 2026/0313309 A1Dolby International AB
- Electronic device and method for performing audio communication between first space and second space1 Oct 2026US 2026/0299873 A1Realtek Semiconductor Corp.
- Multi-Zone Setup And Configuration Of Multi-Player Playback Devices1 Oct 2026US 2026/0299878 A1Sonos, Inc.
- Magnetic earphones holder1 Oct 2026US 2026/0304014 A1Snik LLC
- Cinema Light Emitting Screen and Sound System1 Oct 2026US 2026/0304033 A1IMAX Corporation
Most cited
By later US patents
- System and method for synchronizing operations among a plurality of independently clocked digital data processing devices1,949US 8,234,395 B2Sonos, Inc. · 2012
- Controlling and manipulating groupings in a multi-zone media system1,881US 8,483,853 B1Sonos, Inc. · 2013
- 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
- Unification of multimedia devices1,620US 7,987,294 B2Altec Lansing Australia Pty Limited · 2011