H03F 3/601
Using fet's
Official title: {using FET's, e.g. GaAs FET's (H03F3/607, H03F3/608 take precedence)}
H03F3/601 (Using fet's) appears on 229 US grants and 169 published applications in this corpus.
Search patents in H03F- Granted patents
- 229
- Published applications
- 169
- Assignees
- 112
- Inventors
- 430
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 7 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 8 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 1 |
| 2002 | 7 | 15 |
| 2003 | 8 | 6 |
| 2004 | 9 | 10 |
| 2005 | 9 | 4 |
| 2006 | 5 | 2 |
| 2007 | 2 | 4 |
| 2008 | 3 | 5 |
| 2009 | 1 | 3 |
| 2010 | 3 | 4 |
| 2011 | 5 | 8 |
| 2012 | 6 | 10 |
| 2013 | 5 | 10 |
| 2014 | 9 | 5 |
| 2015 | 10 | 11 |
| 2016 | 9 | 9 |
| 2017 | 8 | 5 |
| 2018 | 13 | 7 |
| 2019 | 8 | 14 |
| 2020 | 10 | 5 |
| 2021 | 6 | 11 |
| 2022 | 7 | 6 |
| 2023 | 5 | 5 |
| 2024 | 3 | 2 |
| 2025 | 5 | 3 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power amplifier circuit30 Sep 2025US 12,431,847 B2Murata Manufacturing Co., Ltd.
- Apparatus comprising a transmission line for radio frequency signals10 Jun 2025US 12,328,156 B2Nokia Solutions and Networks Oy
- High frequency amplifier13 May 2025US 12,301,179 B2Mitsubishi Electric Corporation
- Mixer and semiconductor device25 Mar 2025US 12,261,570 B2Semiconductor Energy Laboratory Co.Ltd.
- Harmonic processing circuit and amplifier21 Jan 2025US 12,206,366 B2Sumitomo Electric Industries, Ltd.
- Power amplifier circuit and multi-stage power amplifier circuit1 Oct 2026US 2026/0303044 A1Murata Manufacturing Co., Ltd.
- Radio-frequency amplifier circuit based on asymmetric fishbone-shaped matching network25 Jun 2026US 2026/0180522 A1Jiashan Fudan Research Institute
- Radio frequency amplifier8 Jan 2026US 2026/0012144 A1Nuvoton Technology Corporation Japan
- Harmonic processing circuit and amplifier8 Jan 2026US 2026/0012149 A1Fujitsu Limited
- Harmonic processing circuit and amplifier10 Apr 2025US 2025/0119103 A1Sumitomo Electric Industries, Ltd.
Most cited
By later US patents
- Method and apparatus for reducing key-up distortion by pre-heating transistors134US 5,920,808 AGlenayre Electronics, Inc. · 1999
- Transformers and amplifiers79US 5,781,071 ASony Corporation · 1998
- Second harmonic terminations for high efficiency radio frequency dual-band power amplifier73US 6,236,274 B1Industrial Technology Research Institute · 2001
- Microwave power circuit with an active device mounted on a heat dissipating substrate60US 4,376,287 ARCA Corporation · 1983
- Dual-gate MESFET combiner/divider for use in adaptive system applications56US 4,511,813 AHarris Corporation · 1985