H03G 9/20
In frequency-selective amplifiers
Official title: in frequency-selective amplifiers
H03G9/20 (In frequency-selective amplifiers) appears on 36 US grants and 33 published applications in this corpus.
Search patents in H03G- Granted patents
- 36
- Published applications
- 33
- Assignees
- 12
- Inventors
- 24
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 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 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 4 | 7 |
| 2018 | 5 | 2 |
| 2019 | 13 | 11 |
| 2020 | 1 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Sheet feeding device and printing apparatus9 Sep 2025US 12,410,033 B2Canon Kabushiki Kaisha
- Amplifier compensation circuits and methods30 May 2023US 11,664,772 B2Analog Devices, Inc.
- Methods and apparatus for adjusting a level of an audio signal5 Apr 2022US 11,296,668 B2Dolby Laboratories Licensing Corporation
- Preamplifier circuit configuration4 May 2021US 10,998,866 B2
- Systems and methods for processing an audio signal for replay on an audio device27 Apr 2021US 10,991,375 B2Mimi Hearing Technologies GmbH
- Sheet feeding device and printing apparatus11 May 2023US 2023/0145298 A1Canon Kabushiki Kaisha
- Amplifier compensation circuits and methods30 Jun 2022US 2022/0209721 A1Analog Devices, Inc.
- Methods and Apparatus for Adjusting a Level of an Audio Signal21 Jan 2021US 2021/0021247 A1Dolby Laboratories Licensing Corporation
- Methods and Apparatus for Adjusting a Level of an Audio Signal27 Feb 2020US 2020/0067473 A1Dolby Laboratories Licensing Corporation
- Novel Preamplifier Circuit Configuration20 Feb 2020US 2020/0059205 A1
Most cited
By later US patents
- Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal112US 8,090,120 B2Dolby Laboratories Licensing Corporation · 2012
- Circuit arrangement for automatic gain control of hearing aids65US 5,687,241 ATopholm & Westermann ApS · 1997
- Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal50US 8,488,809 B2Dolby Laboratories Licensing Corporation · 2013
- Solid state autotune power amplifier21US 4,422,047 AE-Systems, Inc. · 1983
- Systems and methods for processing an audio signal for replay on an audio device18US 10,199,047 B1Mimi Hearing Technologies GmbH · 2019