H04R 5/04
Circuit arrangements
Official title: Circuit arrangements, {e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments (combinations of amplifiers H03F3/68; stereophonic systems H04S)}
H04R5/04 (Circuit arrangements) appears on 3,797 US grants and 4,474 published applications in this corpus.
Search patents in H04R- Granted patents
- 3,797
- Published applications
- 4,474
- Assignees
- 1,108
- Inventors
- 6,764
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 15 | 0 |
| 1998 | 19 | 0 |
| 1999 | 10 | 0 |
| 2000 | 10 | 0 |
| 2001 | 7 | 4 |
| 2002 | 6 | 19 |
| 2003 | 8 | 21 |
| 2004 | 10 | 42 |
| 2005 | 13 | 52 |
| 2006 | 25 | 53 |
| 2007 | 23 | 83 |
| 2008 | 17 | 99 |
| 2009 | 15 | 69 |
| 2010 | 30 | 64 |
| 2011 | 51 | 110 |
| 2012 | 106 | 89 |
| 2013 | 75 | 152 |
| 2014 | 74 | 151 |
| 2015 | 137 | 164 |
| 2016 | 189 | 203 |
| 2017 | 228 | 253 |
| 2018 | 256 | 240 |
| 2019 | 310 | 342 |
| 2020 | 366 | 414 |
| 2021 | 322 | 363 |
| 2022 | 332 | 400 |
| 2023 | 323 | 366 |
| 2024 | 332 | 301 |
| 2025 | 289 | 253 |
| 2026 | 139 | 167 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device and method for expanding 7-channel audio by using radio transmission6 Oct 2026US 12,756,977 B2Samsung Electronics Co., Ltd.
- Method and apparatus for estimating spatial content of soundfield at desired location6 Oct 2026US 12,756,978 B2
- Sound bar system, sound bar, controller, program, and method for setting sound bar6 Oct 2026US 12,756,979 B2D&M Holdings, Inc.
- Coordination of audio devices29 Sep 2026US 12,750,621 B2Dolby International AB
- Methods and systems for sleep management22 Sep 2026US 12,741,117 B2ResMed Sensor Technologies Limited
- Hearing Device User Communicating With a Wireless Communication Device8 Oct 2026US 2026/0311690 A1Sonova AG
- Sound level method and manager, sound reproduction device and audio headset using same8 Oct 2026US 2026/0313295 A1
- Failure Recovery of Wearable Playback Device8 Oct 2026US 2026/0313313 A1Sonos, Inc.
- Systems and methods for signal control across audio, optical, and sensing platforms1 Oct 2026US 2026/0301726 A1Meta Platforms Technologies, LLC
- Immersive audio in a media playback system1 Oct 2026US 2026/0303676 A1Sonos, Inc.
Most cited
By later US patents
- Wireless and wired speaker hub for a home theater system1,803US 7,483,538 B2KSC Industries, Inc. · 2009
- Wired, wireless, infrared, and powerline audio entertainment systems1,763US 7,853,341 B2KSC Industries, Inc. · 2010
- Wired, wireless, infrared, and powerline audio entertainment systems1,762US 8,103,009 B2KSC Industries, Inc. · 2012
- 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