H03F 3/04
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
Official title: with semiconductor devices only
H03F3/04 (Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements) appears on 2,131 US grants and 1,857 published applications in this corpus.
Search patents in H03F- Granted patents
- 2,131
- Published applications
- 1,857
- Assignees
- 843
- Inventors
- 3,589
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 23 | 0 |
| 1978 | 17 | 0 |
| 1979 | 4 | 0 |
| 1980 | 10 | 0 |
| 1981 | 10 | 0 |
| 1982 | 9 | 0 |
| 1983 | 4 | 0 |
| 1984 | 8 | 0 |
| 1985 | 11 | 0 |
| 1986 | 14 | 0 |
| 1987 | 10 | 0 |
| 1988 | 16 | 0 |
| 1989 | 13 | 0 |
| 1990 | 9 | 0 |
| 1991 | 16 | 0 |
| 1992 | 18 | 0 |
| 1993 | 15 | 0 |
| 1994 | 28 | 0 |
| 1995 | 17 | 0 |
| 1996 | 17 | 0 |
| 1997 | 19 | 0 |
| 1998 | 26 | 0 |
| 1999 | 29 | 0 |
| 2000 | 23 | 0 |
| 2001 | 21 | 4 |
| 2002 | 25 | 17 |
| 2003 | 35 | 40 |
| 2004 | 48 | 54 |
| 2005 | 44 | 73 |
| 2006 | 50 | 95 |
| 2007 | 71 | 64 |
| 2008 | 58 | 69 |
| 2009 | 70 | 59 |
| 2010 | 48 | 52 |
| 2011 | 51 | 54 |
| 2012 | 56 | 57 |
| 2013 | 59 | 79 |
| 2014 | 77 | 91 |
| 2015 | 96 | 96 |
| 2016 | 96 | 79 |
| 2017 | 106 | 73 |
| 2018 | 55 | 74 |
| 2019 | 110 | 103 |
| 2020 | 92 | 112 |
| 2021 | 89 | 99 |
| 2022 | 112 | 95 |
| 2023 | 87 | 110 |
| 2024 | 85 | 86 |
| 2025 | 66 | 64 |
| 2026 | 46 | 58 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical transceiver6 Oct 2026US 12,756,473 B2Lumentum Operations LLC
- Semiconductor storage device, printing apparatus, and write control method of semiconductor storage device15 Sep 2026US 12,740,403 B2Canon Kabushiki Kaisha
- Electronic devices with ambient flicker detection8 Sep 2026US 12,730,001 B2Apple Inc.
- High-speed single-ended-to-differential converter with skew control8 Sep 2026US 12,732,283 B1Sicily Merger Sub II, Inc.
- Input buffer and method for operating the same1 Sep 2026US 12,726,158 B2Macronix International Co., Ltd.
- A fast settling offset compensated photon counting frontend8 Oct 2026US 2026/0312546 A1ams-OSRAM AG
- Amplifier gain control for constant input impedance8 Oct 2026US 2026/0312559 A1pSemi Corporation
- Dual mode high speed loopback with voltage level shifting and multiplexing1 Oct 2026US 2026/0299015 A1Advanced Micro Devices, Inc.
- Systems and Methods for Intelligent Transimpedance Amplifiers1 Oct 2026US 2026/0303039 A1TeraSignal LLC
- Harmonic rejection upconverter architecture with improved harmonic rejection17 Sep 2026US 2026/0280597 A1QUALCOMM Incorporated
Most cited
By later US patents
- Wireless diffuse infrared LAN system257US 5,724,168 ASpectrix Corporation · 1998
- Information retrieval system and apparatus251US 4,536,866 AVideonics of Hawaii, Inc. · 1985
- Sensor readout detector circuit206US 5,793,230 ASandia Corporation · 1998
- Electronically tuned power amplifier205US 7,202,734 B12007
- Envelope tracking with low frequency loss correction123US 9,831,834 B2Skyworks Solutions, Inc. · 2017