H03G 5/025
Equalizers
Official title: {Equalizers; Volume or gain control in limited frequency bands}
H03G5/025 (Equalizers) appears on 295 US grants and 245 published applications in this corpus.
Search patents in H03G- Granted patents
- 295
- Published applications
- 245
- Assignees
- 154
- Inventors
- 468
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 9 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 4 |
| 2005 | 0 | 5 |
| 2006 | 4 | 5 |
| 2007 | 2 | 2 |
| 2008 | 1 | 12 |
| 2009 | 1 | 3 |
| 2010 | 4 | 4 |
| 2011 | 6 | 3 |
| 2012 | 6 | 6 |
| 2013 | 1 | 9 |
| 2014 | 5 | 9 |
| 2015 | 6 | 10 |
| 2016 | 13 | 16 |
| 2017 | 17 | 18 |
| 2018 | 24 | 19 |
| 2019 | 28 | 22 |
| 2020 | 19 | 20 |
| 2021 | 13 | 20 |
| 2022 | 15 | 12 |
| 2023 | 16 | 16 |
| 2024 | 10 | 12 |
| 2025 | 9 | 7 |
| 2026 | 9 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Automatic volume leveling6 Oct 2026US 12,756,370 B2Bose Corporation
- Acoustic processing device and acoustic processing method8 Sep 2026US 12,732,147 B2Faurecia Clarion Electronics Co., Ltd.
- Systems and methods for sound quality enhancement with personalized sound equalizer controls11 Aug 2026US 12,705,017 B2Harman International Industries, Incorporated
- Equalizer parameter setting method, audio devices, and readable storage medium7 Jul 2026US 12,677,093 B2Anker Innovations Technology Co., Ltd.
- Adjusting a playback device12 May 2026US 12,625,791 B2Sonos, Inc.
- Techniques for automatic equalization of audio23 Jul 2026US 2026/0213720 A1Harman Becker Automotive Systems GmbH
- Equalizer control9 Jul 2026US 2026/0197583 A1Audiodo AB (publ)
- Methods and apparatus for playback using pre-processed information and personalization4 Jun 2026US 2026/0156322 A1Gracenote, Inc.
- Setting tuning/presets for audio being played from plural sources30 Apr 2026US 2026/0120703 A1Sony Interactive Entertainment Inc.
- Techniques for Enabling Interoperability between Media Playback Systems12 Mar 2026US 2026/0074667 A1Sonos, Inc.
Most cited
By later US patents
- In-room acoustic magnitude response smoothing via summation of correction signals327US 8,194,874 B2Polk Audio, LLC · 2012
- Time zone equalizer248US 5,566,237 ADobbs-Stanford Corporation · 1996
- Audio signal processing system having independent and distinct data buses for concurrently transferring audio signal data to provide acoustic control206US 5,218,710 APioneer Electronic Corporation · 1993
- Smart audio settings116US 9,916,126 B2Sonos, Inc. · 2018
- Audio reproduction characteristics control device85US 5,146,507 AYamaha Corporation · 1992