H03F
Amplifiers
H03F (Amplifiers) appears on 34,884 US grants and 29,773 published applications in this corpus.
Search patents in H03F- Granted patents
- 34,884
- Published applications
- 29,773
- Assignees
- 5,007
- Inventors
- 36,624
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 199 | 0 |
| 1977 | 199 | 0 |
| 1978 | 170 | 0 |
| 1979 | 112 | 0 |
| 1980 | 136 | 0 |
| 1981 | 175 | 0 |
| 1982 | 183 | 0 |
| 1983 | 164 | 0 |
| 1984 | 220 | 0 |
| 1985 | 259 | 0 |
| 1986 | 211 | 0 |
| 1987 | 200 | 0 |
| 1988 | 216 | 0 |
| 1989 | 225 | 0 |
| 1990 | 211 | 0 |
| 1991 | 257 | 0 |
| 1992 | 296 | 0 |
| 1993 | 226 | 0 |
| 1994 | 310 | 0 |
| 1995 | 350 | 0 |
| 1996 | 352 | 0 |
| 1997 | 323 | 0 |
| 1998 | 429 | 0 |
| 1999 | 501 | 0 |
| 2000 | 546 | 0 |
| 2001 | 608 | 169 |
| 2002 | 674 | 720 |
| 2003 | 770 | 763 |
| 2004 | 823 | 893 |
| 2005 | 703 | 1124 |
| 2006 | 998 | 1103 |
| 2007 | 980 | 1136 |
| 2008 | 986 | 1199 |
| 2009 | 1000 | 1070 |
| 2010 | 1140 | 1084 |
| 2011 | 1073 | 1014 |
| 2012 | 1073 | 1073 |
| 2013 | 1144 | 1129 |
| 2014 | 1193 | 1245 |
| 2015 | 1257 | 1270 |
| 2016 | 1366 | 1219 |
| 2017 | 1445 | 1226 |
| 2018 | 1268 | 1278 |
| 2019 | 1515 | 1481 |
| 2020 | 1533 | 1694 |
| 2021 | 1313 | 1453 |
| 2022 | 1286 | 1409 |
| 2023 | 1147 | 1381 |
| 2024 | 1097 | 1453 |
| 2025 | 1134 | 1204 |
| 2026 | 888 | 983 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- H03F 3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements29,930
- H03F 1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only20,443
- H03F 2200/00Indexing scheme relating to amplifiersIndexing code17,707
- H03F 2203/00Indexing scheme relating to amplifiers with only discharge tubes or only semiconductorIndexing code10,041
- H03F 2201/00Indexing scheme relating to details of amplifiers with only discharge tubes, onlyIndexing code1,155
- H03F 19/00Amplifiers using superconductivity effects125
- H03F 7/00Parametric amplifiers94
- H03F 5/00Amplifiers with both discharge tubes and semiconductor devices as amplifying elements50
All 14 main groupsShow fewer
- H03F 13/00Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers31
- H03F 99/00Subject matter not provided for in other groups of this subclass31
- H03F 9/00Magnetic amplifiers27
- H03F 15/00Amplifiers using galvano-magnetic effects not involving mechanical movement22
- H03F 17/00Amplifiers using electroluminescent element or photocell16
- H03F 11/00Dielectric amplifiers7
Recent patents
- Timing pickoff circuit6 Oct 2026US 12,754,331 B2Siemens Medical Solutions USA, Inc.
- Fast settling voltage regulator circuitry with pole frequency tracking6 Oct 2026US 12,754,580 B2Advanced Micro Devices, Inc.
- Data storage device with BiCMOS impedance-matched amplifier with transducer-bias6 Oct 2026US 12,755,754 B1Western Digital Technologies, Inc.
- Power amplifier6 Oct 2026US 12,756,362 B2Himax Technologies Limited
- Doherty amplifier system6 Oct 2026US 12,756,363 B2Qorvo US, Inc.
- Method and Apparatus for Computing Operations on a Non-volatile Memory Device8 Oct 2026US 2026/0311756 A1Singapore University of Technology and Design
- Audio envelope tracking for controlling a tracking power supply8 Oct 2026US 2026/0312540 A1Harman Becker Automotive Systems GmbH
- High-frequency power supply device8 Oct 2026US 2026/0312541 A1Kyosan Electric Mfg. Co., Ltd.
- Multistage amplifier8 Oct 2026US 2026/0312542 A1NTT, Inc.
- Doherty power amplifiers with controllable capacitor for tuning harmonic termination and inverter8 Oct 2026US 2026/0312543 A1Skyworks Solutions, Inc.
Most cited
By later US patents
- Wireless medical diagnosis and monitoring equipment1,499US 5,957,854 A1999
- Electronic device having sound output module1,021US 7,046,082 B2Rohm Co., Ltd. · 2006
- Wireless medical diagnosis and monitoring equipment692US 5,862,803 A1999
- Wireless medical diagnosis and monitoring equipment582US 7,215,991 B2Motorola, Inc. · 2007
- Wireless medical diagnosis and monitoring equipment485US 6,289,238 B1Motorola, Inc. · 2001