H03G 3/3005
In amplifiers suitable for low-frequencies
Official title: {in amplifiers suitable for low-frequencies, e.g. audio amplifiers (H03G3/32, H03G3/34 take precedence)}
H03G3/3005 (In amplifiers suitable for low-frequencies) appears on 1,597 US grants and 1,486 published applications in this corpus.
Search patents in H03G- Granted patents
- 1,597
- Published applications
- 1,486
- Assignees
- 624
- Inventors
- 2,720
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 17 | 0 |
| 1978 | 14 | 0 |
| 1979 | 9 | 0 |
| 1980 | 15 | 0 |
| 1981 | 16 | 0 |
| 1982 | 16 | 0 |
| 1983 | 15 | 0 |
| 1984 | 14 | 0 |
| 1985 | 17 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 7 | 0 |
| 1989 | 12 | 0 |
| 1990 | 12 | 0 |
| 1991 | 7 | 0 |
| 1992 | 12 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 10 | 0 |
| 1996 | 5 | 0 |
| 1997 | 11 | 0 |
| 1998 | 9 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 1 |
| 2002 | 3 | 11 |
| 2003 | 3 | 3 |
| 2004 | 6 | 12 |
| 2005 | 9 | 21 |
| 2006 | 9 | 20 |
| 2007 | 8 | 23 |
| 2008 | 10 | 27 |
| 2009 | 13 | 28 |
| 2010 | 15 | 32 |
| 2011 | 23 | 30 |
| 2012 | 28 | 51 |
| 2013 | 27 | 62 |
| 2014 | 37 | 68 |
| 2015 | 50 | 77 |
| 2016 | 83 | 79 |
| 2017 | 124 | 127 |
| 2018 | 129 | 116 |
| 2019 | 146 | 125 |
| 2020 | 129 | 141 |
| 2021 | 105 | 100 |
| 2022 | 104 | 96 |
| 2023 | 94 | 83 |
| 2024 | 70 | 66 |
| 2025 | 50 | 47 |
| 2026 | 37 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Playback device pairing22 Sep 2026US 12,745,041 B2Sonos, Inc.
- Volume management in a media playback system8 Sep 2026US 12,732,751 B2Sonos, Inc.
- System and method for detecting analog signals on an amplifier input and gating the same8 Sep 2026US 12,732,765 B2Crestron Electronics, Inc.
- Command dial in a media playback system18 Aug 2026US 12,710,917 B2Sonos, Inc.
- Transients minimization of digital systems due to memory update18 Aug 2026US 12,712,509 B2Infineon Technologies AG
- Noise reduction earphone and earphone noise reduction method8 Oct 2026US 2026/0311673 A1Shenzhen Dancing Future Technology Ltd.
- Microphones with signal-to-noise ratio on-demand1 Oct 2026US 2026/0303047 A1
- Acoustic reproduction system1 Oct 2026US 2026/0304062 A1Adaptive Audio Limited
- Devices and methods to control dynamic audio range in boosted audio systems10 Sep 2026US 2026/0267364 A1
- Current shunt monitoring system10 Sep 2026US 2026/0269798 A1Faraday Technology Corp.
Most cited
By later US patents
- User profile based audio adjustment techniques219US 8,989,406 B2Sony Corporation · 2015
- Recognizing speech in the presence of additional audio207US 9,601,116 B2Google Inc. · 2017
- Volume control190US 9,755,605 B1Amazon Technologies, Inc. · 2017
- Automatic audio mixing selector device187US 4,306,114 ASumma-Nova Corporation · 1981
- Volume interactions for connected playback devices181US 8,995,687 B2Sonos, Inc. · 2015