H03F 3/02
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
Official title: with tubes only
H03F3/02 (Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements) appears on 27 US grants and 29 published applications in this corpus.
Search patents in H03F- Granted patents
- 27
- Published applications
- 29
- Assignees
- 17
- Inventors
- 41
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 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 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 5 |
| 2006 | 3 | 0 |
| 2007 | 0 | 2 |
| 2008 | 4 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 1 |
| 2016 | 3 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 3 | 2 |
| 2020 | 0 | 1 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Transistor bias adjustment for optimization of third order intercept point in a cascode amplifier24 Jun 2025US 12,341,474 B2pSemi Corporation
- Vacuum tube for amplifier circuit, and amplifier circuit using same19 Nov 2024US 12,149,214 B2Hamamatsu Photonics K.K.
- Vacuum tube amplifier module and assembly method thereof24 Sep 2024US 12,101,064 B2Dreamus Company
- Transistor bias adjustment for optimization of third order intercept point in a cascode amplifier6 Feb 2024US 11,894,809 B2pSemi Corporation
- Transistor bias adjustment for optimization of third order intercept point in a cascode amplifier10 May 2022US 11,329,611 B2pSemi Corporation
- Transistor Bias Adjustment for Optimization of Third Order Intercept Point in a Cascode Amplifier15 Jan 2026US 2026/0019044 A1pSemi Corporation
- Amplifying circuit and voltage generating circuit6 Nov 2025US 2025/0341851 A1Realtek Semiconductor Corp.
- Dual primary multi-coupled output amplifier architecture18 Sep 2025US 2025/0293644 A1
- Transistor Bias Adjustment for Optimization of Third Order Intercept Point in a Cascode Amplifier22 Aug 2024US 2024/0283407 A1pSemi Corporation
- Transit16 Mar 2023US 2023/0080804 A1Roxtec AB
Most cited
By later US patents
- Multi-primary distributed active transformer amplifier power supply and control29US 7,471,153 B2Axiom Microdevices, Inc. · 2008
- Supply circuit for power amplifier drivers18US 7,095,283 B2Axiom Microdevices, Inc. · 2006
- Multi-primary distributed active transformer amplifier power supply and control9US 7,760,025 B2Axiom Microdevices, Inc. · 2010
- Multi-primary distributed active transformer amplifier power supply and control9US 7,915,960 B2Axiom Microdevices, Inc. · 2011
- Multi-primary distributed active transformer amplifier power supply and control7US 8,242,855 B2Axiom Microdevices, Inc. · 2012