H03F 2201/00
Indexing scheme relating to details of amplifiers with only discharge tubes, only
Official title: Indexing scheme relating to details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements covered by H03F1/00
H03F2201/00 (Indexing scheme relating to details of amplifiers with only discharge tubes, only) appears on 1,155 US grants and 1,060 published applications in this corpus.
Search patents in H03F- Granted patents
- 1,155
- Published applications
- 1,060
- Assignees
- 346
- Inventors
- 1,641
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 12 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 11 | 0 |
| 1996 | 17 | 0 |
| 1997 | 10 | 0 |
| 1998 | 13 | 0 |
| 1999 | 25 | 0 |
| 2000 | 14 | 0 |
| 2001 | 17 | 6 |
| 2002 | 18 | 24 |
| 2003 | 14 | 18 |
| 2004 | 21 | 16 |
| 2005 | 9 | 44 |
| 2006 | 32 | 28 |
| 2007 | 26 | 43 |
| 2008 | 44 | 33 |
| 2009 | 19 | 33 |
| 2010 | 44 | 47 |
| 2011 | 32 | 29 |
| 2012 | 37 | 55 |
| 2013 | 74 | 54 |
| 2014 | 50 | 56 |
| 2015 | 72 | 101 |
| 2016 | 88 | 66 |
| 2017 | 83 | 61 |
| 2018 | 65 | 58 |
| 2019 | 46 | 42 |
| 2020 | 55 | 60 |
| 2021 | 38 | 47 |
| 2022 | 41 | 38 |
| 2023 | 27 | 34 |
| 2024 | 26 | 21 |
| 2025 | 24 | 25 |
| 2026 | 18 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for digital predistortion initialization of high-power amplifiers29 Sep 2026US 12,750,013 B2L3Harris Technologies, Inc.
- Systems and methods for multiband linearization architecture using kernel regression25 Aug 2026US 12,719,513 B2Telefonaktiebolaget LM Ericsson (publ)
- Multiband digital predistortion for broadband communications4 Aug 2026US 12,700,882 B2Hughes Network Systems, LLC
- Practical predistortion architectures for multiband radios16 Jun 2026US 12,658,859 B2Telefonaktiebolaget LM Ericsson (publ)
- Analog predistortion (APD) for power amplifier16 Jun 2026US 12,658,860 B2Qorvo US, Inc.
- Dual memory digital predistortion for dual chain doherty power amplifier13 Aug 2026US 2026/0238239 A1QUALCOMM Incorporated
- Filter switching circuit23 Jul 2026US 2026/0213778 A1Murata Manufacturing Co., Ltd.
- Generating digital predistortion models using performance metrics9 Jul 2026US 2026/0196973 A1Telefonaktiebolaget LM Ericsson (publ)
- Feed-forward amplifier and method for transitioning between offline and online tuning states2 Jul 2026US 2026/0189195 A1
- Semi-parametric digital pre-distortion18 Jun 2026US 2026/0171994 A1Avago Technologies International Sales Pte. Limited
Most cited
By later US patents
- Distortion compensation apparatus and distortion compensation method358US 9,397,619 B2Fujitsu Limited · 2016
- Linear transmitter using predistortion283US 5,732,333 AGlenayre Electronics, Inc. · 1998
- Digital predistortion methods for wideband amplifiers282US 6,587,514 B1PMC-Sierra, Inc. · 2003
- Wideband digital predistortion linearizer for nonlinear amplifiers234US 6,798,843 B1PMC-Sierra, Inc. · 2004
- Linear amplifier arrangement212US 6,275,685 B1Nortel Networks Limited · 2001