H03F 3/2173
Of the bridge type
Official title: {of the bridge type}
H03F3/2173 (Of the bridge type) appears on 1,108 US grants and 1,148 published applications in this corpus.
Search patents in H03F- Granted patents
- 1,108
- Published applications
- 1,148
- Assignees
- 430
- Inventors
- 1,610
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 8 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 13 | 7 |
| 2002 | 14 | 21 |
| 2003 | 22 | 24 |
| 2004 | 32 | 36 |
| 2005 | 26 | 35 |
| 2006 | 29 | 25 |
| 2007 | 37 | 54 |
| 2008 | 33 | 37 |
| 2009 | 29 | 48 |
| 2010 | 45 | 34 |
| 2011 | 46 | 37 |
| 2012 | 36 | 23 |
| 2013 | 39 | 47 |
| 2014 | 25 | 27 |
| 2015 | 39 | 47 |
| 2016 | 45 | 59 |
| 2017 | 66 | 62 |
| 2018 | 64 | 69 |
| 2019 | 72 | 57 |
| 2020 | 64 | 60 |
| 2021 | 57 | 61 |
| 2022 | 58 | 58 |
| 2023 | 60 | 69 |
| 2024 | 36 | 52 |
| 2025 | 47 | 44 |
| 2026 | 35 | 55 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Audio amplifier22 Sep 2026US 12,744,498 B2Harman International Industries, Incorporated
- Low-EMI capacitively-coupled Class-D amplifiers with voltage boosting15 Sep 2026US 12,738,904 B2National Cheng Kung University
- Voltage and current sense circuits for measuring a load connected to a power amplifier25 Aug 2026US 12,716,920 B2Goodix Technology (Hk) Company Limited
- Signal amplifier25 Aug 2026US 12,719,421 B2Renesas Design (UK) Limited
- Zero-common-mode modulation with digital feedback to damp common-mode resonance and suppress cross-over distortion24 Sep 2026US 2026/0291447 A1Monolithic Power Systems, Inc.
- Switching amplifiers24 Sep 2026US 2026/0291452 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254416 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254417 A1Cirrus Logic International Semiconductor Ltd.
- Switching amplifiers27 Aug 2026US 2026/0254421 A1Cirrus Logic International Semiconductor Ltd.
Most cited
By later US patents
- High power battery powered RF amplifier topology200US 10,159,524 B2Ethicon, Inc. · 2018
- Monolithic class D amplifier170US 5,973,368 A1999
- Apparatus and method for efficiently amplifying wideband envelope signals157US 6,300,826 B12001
- Systems and methods for improving performance in a digital amplifier by adding an ultrasonic signal to an input audio signal118US 7,649,410 B2D2Audio Corporation · 2010
- Class-D amplifier system105US 7,262,658 B2Texas Instruments Incorporated · 2007