H04R 2227/00
Details of public address [pa] systems covered by h04r27/00 but not provided
Official title: Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
H04R2227/00 (Details of public address [pa] systems covered by h04r27/00 but not provided) appears on 2,440 US grants and 2,817 published applications in this corpus.
Search patents in H04R- Granted patents
- 2,440
- Published applications
- 2,817
- Assignees
- 543
- Inventors
- 2,889
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 9 |
| 2003 | 1 | 10 |
| 2004 | 3 | 7 |
| 2005 | 1 | 18 |
| 2006 | 6 | 19 |
| 2007 | 8 | 24 |
| 2008 | 6 | 22 |
| 2009 | 8 | 18 |
| 2010 | 25 | 25 |
| 2011 | 13 | 24 |
| 2012 | 33 | 48 |
| 2013 | 35 | 96 |
| 2014 | 28 | 90 |
| 2015 | 90 | 148 |
| 2016 | 145 | 232 |
| 2017 | 225 | 214 |
| 2018 | 250 | 219 |
| 2019 | 260 | 277 |
| 2020 | 260 | 215 |
| 2021 | 204 | 204 |
| 2022 | 177 | 189 |
| 2023 | 202 | 205 |
| 2024 | 174 | 207 |
| 2025 | 178 | 186 |
| 2026 | 88 | 110 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04R 2227/005Audio distribution systems for home, i.e. multi-room useIndexing code1,576
- H04R 2227/003Digital pa systems usingIndexing code1,326
- H04R 2227/009Signal processing in [pa] systems to enhance the speech intelligibilityIndexing code166
- H04R 2227/001Adaptation of signal processing in pa systems in dependence of presence ofIndexing code157
- H04R 2227/007Electronic adaptation of audio signals to reverberation of the listening space forIndexing code147
Recent patents
- Speakerphone with room acoustics characterization and related methods6 Oct 2026US 12,756,775 B2
- Arbitration-based voice recognition29 Sep 2026US 12,749,486 B2Sonos, Inc.
- Distributed generative models29 Sep 2026US 12,750,620 B2Sonos, Inc.
- Portable speaker with audio monitor and output network link29 Sep 2026US 12,750,624 B2Bose Corporation
- Media playback based on sensor data29 Sep 2026US 12,750,630 B2Sonos, Inc.
- Failure Recovery of Wearable Playback Device8 Oct 2026US 2026/0313313 A1Sonos, Inc.
- Playback Expansion1 Oct 2026US 2026/0299876 A1Sonos, Inc.
- Multi-Zone Setup And Configuration Of Multi-Player Playback Devices1 Oct 2026US 2026/0299878 A1Sonos, Inc.
- Immersive audio in a media playback system1 Oct 2026US 2026/0303676 A1Sonos, Inc.
- Device designation of playback and network microphone device arrangements17 Sep 2026US 2026/0281620 A1Sonos, Inc.
Most cited
By later US patents
- Method and apparatus for controlling multimedia players in a multi-zone system2,132US 7,571,014 B1Sonos, Inc. · 2009
- 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 network distribution system1,807US 7,643,894 B2Netstreams, LLC · 2010
- Wired, wireless, infrared, and powerline audio entertainment systems1,762US 8,103,009 B2KSC Industries, Inc. · 2012