H03F 3/185
With field-effect devices
Official title: with field-effect devices (H03F3/187 takes precedence)
H03F3/185 (With field-effect devices) appears on 382 US grants and 394 published applications in this corpus.
Search patents in H03F- Granted patents
- 382
- Published applications
- 394
- Assignees
- 175
- Inventors
- 560
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 3 |
| 2004 | 0 | 4 |
| 2005 | 3 | 4 |
| 2006 | 5 | 2 |
| 2007 | 5 | 3 |
| 2008 | 2 | 7 |
| 2009 | 1 | 8 |
| 2010 | 7 | 6 |
| 2011 | 4 | 8 |
| 2012 | 11 | 7 |
| 2013 | 10 | 16 |
| 2014 | 12 | 23 |
| 2015 | 17 | 36 |
| 2016 | 42 | 31 |
| 2017 | 42 | 49 |
| 2018 | 40 | 24 |
| 2019 | 19 | 26 |
| 2020 | 33 | 36 |
| 2021 | 23 | 18 |
| 2022 | 18 | 16 |
| 2023 | 19 | 28 |
| 2024 | 10 | 10 |
| 2025 | 16 | 10 |
| 2026 | 8 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electret microphone4 Aug 2026US 12,701,367 B2Sennheiser electronic GmbH & Co. KG
- Audio signal reproduction19 May 2026US 12,634,640 B2
- Amplifying circuit and charging method which can improve abnormal sound24 Mar 2026US 12,587,147 B2Realtek Semiconductor Corp.
- Speaker array addressed by row and column selection24 Mar 2026US 12,587,788 B2Google Inc.
- Amplifiers10 Mar 2026US 12,570,018 B2Cirrus Logic, Inc.
- Switching amplifiers27 Aug 2026US 2026/0254416 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254417 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254421 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254422 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254423 A1Cirrus Logic International Semiconductor Ltd.
Most cited
By later US patents
- Amplifier circuit and method of amplifying a signal in an amplifier circuit98US 8,198,941 B2Wolfson Microelectronics plc · 2012
- Preamplifier for two terminal electret condenser microphones85US 6,888,408 B2Sonion Tech A/S · 2005
- Audio out unit85US 7,994,864 B2Mediatek Inc. · 2011
- Amplifying apparatus80US 8,164,388 B2Yamaha Corporation · 2012
- Amplifier circuit and method of amplifying a signal in an amplifier circuit44US 8,514,025 B2Wolfson Microelectronics plc · 2013