H04R 2420/05
Detection of connection of loudspeakers or headphones to amplifiers
H04R2420/05 (Detection of connection of loudspeakers or headphones to amplifiers) appears on 619 US grants and 738 published applications in this corpus.
Search patents in H04R- Granted patents
- 619
- Published applications
- 738
- Assignees
- 274
- Inventors
- 1,360
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 2 |
| 2002 | 2 | 3 |
| 2003 | 0 | 1 |
| 2004 | 3 | 10 |
| 2005 | 5 | 8 |
| 2006 | 4 | 12 |
| 2007 | 2 | 12 |
| 2008 | 2 | 11 |
| 2009 | 3 | 13 |
| 2010 | 9 | 19 |
| 2011 | 8 | 27 |
| 2012 | 17 | 23 |
| 2013 | 24 | 37 |
| 2014 | 18 | 43 |
| 2015 | 39 | 54 |
| 2016 | 53 | 45 |
| 2017 | 55 | 78 |
| 2018 | 70 | 52 |
| 2019 | 44 | 44 |
| 2020 | 53 | 52 |
| 2021 | 45 | 39 |
| 2022 | 37 | 37 |
| 2023 | 35 | 42 |
| 2024 | 35 | 34 |
| 2025 | 31 | 24 |
| 2026 | 18 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Magnetic earphones holder15 Sep 2026US 12,739,554 B2Snik LLC
- Audio output system and method15 Sep 2026US 12,739,563 B2Kokozi Co., Ltd
- Earphone connection method and apparatus, earphone, and medium8 Sep 2026US 12,732,741 B2Goertek Inc.
- System and method for wireless audio connectivity detection and routing of an incoming call25 Aug 2026US 12,719,977 B2Motorola Solutions, Inc.
- Removeable speaker for computing devices25 Aug 2026US 12,720,260 B2Dolby Laboratories Licensing Corporation
- Failure Recovery of Wearable Playback Device8 Oct 2026US 2026/0313313 A1Sonos, Inc.
- Un-Tethered Wireless Audio System27 Aug 2026US 2026/0255105 A1Apple Inc.
- Sleep modes for plugged-in players20 Aug 2026US 2026/0247075 A1
- Power management and distributed audio processing techniques for playback devices2 Jul 2026US 2026/0186736 A1Sonos, Inc.
- Earphone connection method and apparatus, earphone, and medium2 Jul 2026US 2026/0189844 A1Goertek Inc.
Most cited
By later US patents
- User interface for managing the operation of networked media playback devices443US 8,423,893 B2Altec Lansing Australia Pty Limited · 2013
- Method and apparatus for automatically enabling subwoofer channel audio based on detection of subwoofer device364US 7,792,311 B1Sonos, Inc. · 2010
- Plug and play compatible speakers275US 6,859,538 B1Hewlett-Packard Development Company, L. P. · 2005
- Device playback failure recovery and redistribution228US 8,903,526 B2Sonos, Inc. · 2014
- Connector device for information-handling apparatus and connector device for stereophonic audio/video apparatus151US 6,069,960 ASony Corporation · 2000