H03F 1/08
Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying
Official title: Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements (wide-band amplifiers with inter-stage coupling networks incorporating these impedances H03F1/42)
H03F1/08 (Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying) appears on 2,968 US grants and 2,767 published applications in this corpus.
Search patents in H03F- Granted patents
- 2,968
- Published applications
- 2,767
- Assignees
- 817
- Inventors
- 4,348
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 5 | 0 |
| 1978 | 11 | 0 |
| 1979 | 7 | 0 |
| 1980 | 7 | 0 |
| 1981 | 10 | 0 |
| 1982 | 11 | 0 |
| 1983 | 17 | 0 |
| 1984 | 13 | 0 |
| 1985 | 20 | 0 |
| 1986 | 12 | 0 |
| 1987 | 19 | 0 |
| 1988 | 19 | 0 |
| 1989 | 9 | 0 |
| 1990 | 12 | 0 |
| 1991 | 20 | 0 |
| 1992 | 10 | 0 |
| 1993 | 9 | 0 |
| 1994 | 20 | 0 |
| 1995 | 25 | 0 |
| 1996 | 27 | 0 |
| 1997 | 24 | 0 |
| 1998 | 20 | 0 |
| 1999 | 24 | 0 |
| 2000 | 41 | 0 |
| 2001 | 35 | 11 |
| 2002 | 47 | 45 |
| 2003 | 50 | 44 |
| 2004 | 58 | 60 |
| 2005 | 40 | 81 |
| 2006 | 72 | 76 |
| 2007 | 80 | 97 |
| 2008 | 83 | 92 |
| 2009 | 78 | 78 |
| 2010 | 105 | 83 |
| 2011 | 99 | 71 |
| 2012 | 74 | 77 |
| 2013 | 70 | 94 |
| 2014 | 108 | 128 |
| 2015 | 112 | 130 |
| 2016 | 123 | 123 |
| 2017 | 148 | 127 |
| 2018 | 150 | 168 |
| 2019 | 186 | 144 |
| 2020 | 139 | 162 |
| 2021 | 128 | 131 |
| 2022 | 111 | 161 |
| 2023 | 115 | 180 |
| 2024 | 127 | 174 |
| 2025 | 146 | 133 |
| 2026 | 80 | 97 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H03F 1/22By use of cascode coupling, i.e. earthed cathode or emitter stage followed1,751
- H03F 1/083In transistor amplifiers806
- H03F 1/14By use of neutralising means218
- H03F 1/18By use of distributed coupling , i.e. distributed amplifiers73
- H03F 1/12By use of attenuating means38
- H03F 1/10By use of amplifying elements with multiple electrode connections7
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Most cited
By later US patents
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