H03F 1/04
In discharge-tube amplifiers
Official title: in discharge-tube amplifiers
H03F1/04 (In discharge-tube amplifiers) appears on 84 US grants and 77 published applications in this corpus.
Search patents in H03F- Granted patents
- 84
- Published applications
- 77
- Assignees
- 55
- Inventors
- 150
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 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 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 6 |
| 2015 | 2 | 4 |
| 2016 | 12 | 11 |
| 2017 | 12 | 8 |
| 2018 | 8 | 9 |
| 2019 | 11 | 9 |
| 2020 | 11 | 6 |
| 2021 | 3 | 2 |
| 2022 | 3 | 6 |
| 2023 | 1 | 3 |
| 2024 | 4 | 3 |
| 2025 | 6 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Radio frequency amplifier30 Dec 2025US 12,512,792 B2NXP USA, Inc.
- Electronic device comprising amplifier circuit for processing wideband RF signal23 Dec 2025US 12,506,448 B2Samsung Electronics Co., Ltd.
- Wireless communications system, power supply system, and terminal device21 Oct 2025US 12,451,911 B2Huawei Technologies Co., Ltd.
- Analog amplitude pre-distortion circuit and method27 May 2025US 12,316,283 B2NXP USA, Inc.
- Harmonic processing circuit and amplifier21 Jan 2025US 12,206,366 B2Sumitomo Electric Industries, Ltd.
- Wireless communications system, power supply system, and terminal device15 Jan 2026US 2026/0019095 A1Huawei Technologies Co., Ltd.
- Harmonic processing circuit and amplifier10 Apr 2025US 2025/0119103 A1Sumitomo Electric Industries, Ltd.
- Load-modulated balanced amplifier (lmba) based on variable cross-coupled pair (xcp)8 Aug 2024US 2024/0267015 A1Chengdu Fluxworks Technology Co., Ltd
- System and method for managing the operation of a travelling wave tube amplifier6 Jun 2024US 2024/0186957 A1
- Analog amplitude pre-distortion circuit and method18 Jan 2024US 2024/0022216 A1NXP USA, Inc.
Most cited
By later US patents
- Apparatus and methods for capacitive load reduction61US 8,598,950 B2Skyworks Solutions, Inc. · 2013
- Linear power amplifier27US 6,043,712 AMotorola, Inc. · 2000
- Amplitude modulator using a carrier tube and a peaking tube12US 4,335,363 AThe Marconi Company Limited · 1982
- Apparatus and methods for capacitive load reduction of an envelope tracker12US 9,548,702 B2Skyworks Solutions, Inc. · 2017
- Power amplification system with reactance compensation11US 10,110,184 B2Skyworks Solutions, Inc. · 2018