H03F 3/54
Amplifiers using transit-time effect in tubes or semiconductor devices
Official title: Amplifiers using transit-time effect in tubes or semiconductor devices (parametric amplifiers H03F7/00; solid state travelling-wave devices H10N70/10)
H03F3/54 (Amplifiers using transit-time effect in tubes or semiconductor devices) appears on 157 US grants and 86 published applications in this corpus.
Search patents in H03F- Granted patents
- 157
- Published applications
- 86
- Assignees
- 81
- Inventors
- 273
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 8 | 7 |
| 2003 | 3 | 3 |
| 2004 | 5 | 3 |
| 2005 | 1 | 2 |
| 2006 | 2 | 6 |
| 2007 | 3 | 1 |
| 2008 | 4 | 5 |
| 2009 | 4 | 4 |
| 2010 | 2 | 1 |
| 2011 | 2 | 2 |
| 2012 | 4 | 2 |
| 2013 | 0 | 1 |
| 2014 | 3 | 6 |
| 2015 | 2 | 1 |
| 2016 | 5 | 6 |
| 2017 | 7 | 6 |
| 2018 | 3 | 7 |
| 2019 | 2 | 3 |
| 2020 | 10 | 5 |
| 2021 | 4 | 2 |
| 2022 | 2 | 3 |
| 2023 | 4 | 3 |
| 2024 | 4 | 4 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power transfer system and methods10 Feb 2026US 12,549,222 B2Daanaa Resolution Inc.
- Radio-frequency assembly with impedance matching filter21 Jan 2025US 12,206,386 B2Tesat-Spacecom GmbH & Co. KG
- Methods of making a self-assembled slow-wave structures17 Sep 2024US 12,091,746 B2The Regents of the University of New Mexico
- Amplifier circuit30 Jul 2024US 12,051,998 B2Sumitomo Electric Industries, Ltd.
- Signal transmitter13 Feb 2024US 11,901,923 B2Huawei Technologies Co., Ltd.
- Directed self-assembly of helices via electrodeposition on end-tethered nanomembrane ribbons for millimeter-wave traveling-wave tube amplifiers9 Oct 2025US 2025/0317115 A1UNM Rainforest Innovations
- Travelling-Wave Tube, Electron Gun, and Power Amplification System27 Feb 2025US 2025/0070736 A1Huawei Technologies Co., Ltd.
- System and method for managing the operation of a travelling wave tube amplifier6 Jun 2024US 2024/0186957 A1
- Power transfer system and methods18 Apr 2024US 2024/0128998 A1Daanaa Resolution Inc.
- Signal termination for amplifiers8 Feb 2024US 2024/0048109 A1Semtech Corporation
Most cited
By later US patents
- Wide-band gyrotron traveling-wave amplifier229US 4,533,875 A1985
- System and method for noise and spurious suppression in power amplifier systems71US 6,459,337 B1Teledyne Technologies Incorporated · 2002
- System and method for noise and spurious supression in power amplifier systems65US 6,535,060 B2Teledyne Technologies Incorporated · 2003
- Digitally controllable nonlinear pre-equalizer65US 6,674,326 B1The Boeing Company · 2004
- System and method for noise and spurious suppression in power amplifier systems65US 6,791,408 B2Teledyne Technologies Incorporated · 2004