H03G
Control of amplification
H03G (Control of amplification) appears on 14,052 US grants and 10,692 published applications in this corpus.
Search patents in H03G- Granted patents
- 14,052
- Published applications
- 10,692
- Assignees
- 2,938
- Inventors
- 19,521
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 153 | 0 |
| 1977 | 121 | 0 |
| 1978 | 113 | 0 |
| 1979 | 100 | 0 |
| 1980 | 139 | 0 |
| 1981 | 133 | 0 |
| 1982 | 134 | 0 |
| 1983 | 138 | 0 |
| 1984 | 168 | 0 |
| 1985 | 172 | 0 |
| 1986 | 112 | 0 |
| 1987 | 124 | 0 |
| 1988 | 117 | 0 |
| 1989 | 142 | 0 |
| 1990 | 111 | 0 |
| 1991 | 137 | 0 |
| 1992 | 144 | 0 |
| 1993 | 161 | 0 |
| 1994 | 196 | 0 |
| 1995 | 177 | 0 |
| 1996 | 191 | 0 |
| 1997 | 178 | 0 |
| 1998 | 256 | 0 |
| 1999 | 220 | 0 |
| 2000 | 204 | 0 |
| 2001 | 202 | 72 |
| 2002 | 209 | 245 |
| 2003 | 218 | 347 |
| 2004 | 287 | 433 |
| 2005 | 240 | 446 |
| 2006 | 372 | 416 |
| 2007 | 332 | 453 |
| 2008 | 332 | 451 |
| 2009 | 338 | 447 |
| 2010 | 370 | 408 |
| 2011 | 379 | 393 |
| 2012 | 488 | 439 |
| 2013 | 469 | 499 |
| 2014 | 449 | 506 |
| 2015 | 553 | 525 |
| 2016 | 563 | 493 |
| 2017 | 643 | 507 |
| 2018 | 579 | 569 |
| 2019 | 663 | 524 |
| 2020 | 563 | 535 |
| 2021 | 420 | 407 |
| 2022 | 402 | 377 |
| 2023 | 362 | 392 |
| 2024 | 317 | 338 |
| 2025 | 266 | 262 |
| 2026 | 195 | 208 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- H03G 3/00Gain control in amplifiers or frequency changers9,968
- H03G 1/00Details of arrangements for controlling amplification2,857
- H03G 5/00Tone control or bandwidth control in amplifiers1,882
- H03G 7/00Volume compression or expansion in amplifiers1,377
- H03G 9/00Combinations of two or more types of control901
- H03G 2201/00Indexing scheme relating to subclass h03gIndexing code695
- H03G 11/00Limiting amplitude658
- H03G 99/00Subject matter not provided for in other groups of this subclass6
Recent patents
- Methods and apparatus for audio equalization based on variant selection6 Oct 2026US 12,755,153 B2Gracenote, Inc.
- Automatic volume leveling6 Oct 2026US 12,756,370 B2Bose Corporation
- Auto-recovery overcurrent protection for audio notification appliance circuit in fire protection system6 Oct 2026US 12,756,974 B2Tyco Fire & Security GmbH
- Radio frequency low noise amplifiers29 Sep 2026US 12,750,021 B2Huawei Technologies Co., Ltd.
- Tunable effective inductance for multi-gain LNA with inductive source degeneration29 Sep 2026US 12,750,026 B2pSemi Corporation
- Noise reduction earphone and earphone noise reduction method8 Oct 2026US 2026/0311673 A1Shenzhen Dancing Future Technology Ltd.
- Amplifier gain control for constant input impedance8 Oct 2026US 2026/0312559 A1pSemi Corporation
- Electrical isolation monitoring1 Oct 2026US 2026/0296243 A1Rivian IP Holdings, LLC
- Robust voice activity detector system for use with an earphone1 Oct 2026US 2026/0299875 A1ST DetectTech, LLC
- Semiconductor device1 Oct 2026US 2026/0303033 A1Mitsumi Electric Co., Ltd.
Most cited
By later US patents
- 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
- Method and device for obtaining playlist content over a network1,821US 8,045,952 B2Horsham Enterprises, LLC · 2011
- Method and device for an internet radio capable of obtaining playlist content from a content server732US 8,050,652 B2Horsham Enterprises, LLC · 2011
- Shaping sound responsive to speaker orientation476US 9,042,556 B2Sonos, Inc. · 2015