H03H 19/00
Networks using time-varying elements
Official title: Networks using time-varying elements, e.g. N-path filters
H03H19/00 (Networks using time-varying elements) appears on 737 US grants and 453 published applications in this corpus.
Search patents in H03H- Granted patents
- 737
- Published applications
- 453
- Assignees
- 287
- Inventors
- 1,077
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 9 | 0 |
| 1981 | 10 | 0 |
| 1982 | 29 | 0 |
| 1983 | 9 | 0 |
| 1984 | 14 | 0 |
| 1985 | 20 | 0 |
| 1986 | 15 | 0 |
| 1987 | 9 | 0 |
| 1988 | 12 | 0 |
| 1989 | 12 | 0 |
| 1990 | 11 | 0 |
| 1991 | 9 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 7 | 0 |
| 1996 | 12 | 0 |
| 1997 | 10 | 0 |
| 1998 | 13 | 0 |
| 1999 | 5 | 0 |
| 2000 | 13 | 0 |
| 2001 | 12 | 5 |
| 2002 | 14 | 11 |
| 2003 | 11 | 7 |
| 2004 | 5 | 13 |
| 2005 | 10 | 14 |
| 2006 | 13 | 11 |
| 2007 | 10 | 18 |
| 2008 | 14 | 15 |
| 2009 | 10 | 23 |
| 2010 | 22 | 26 |
| 2011 | 21 | 39 |
| 2012 | 25 | 10 |
| 2013 | 40 | 30 |
| 2014 | 30 | 27 |
| 2015 | 22 | 17 |
| 2016 | 28 | 30 |
| 2017 | 28 | 27 |
| 2018 | 31 | 16 |
| 2019 | 33 | 32 |
| 2020 | 38 | 17 |
| 2021 | 21 | 19 |
| 2022 | 10 | 12 |
| 2023 | 7 | 11 |
| 2024 | 15 | 7 |
| 2025 | 9 | 12 |
| 2026 | 8 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Energy efficient ultra-wideband impulse radio systems and methods8 Sep 2026US 12,732,226 B2Transfert Plus, Societe en Commandite
- NPF radiofrequency device11 Aug 2026US 12,706,604 B2Centre National De La Recherche Scientifique
- Multi-slope switching circuit for switched-capacitor signal integrator21 Jul 2026US 12,689,371 B1QUALCOMM Incorporated
- Tracker module, radio frequency system, and communication device19 May 2026US 12,633,903 B2Murata Manufacturing Co., Ltd.
- Bulk acoustic wave resonance device and bulk acoustic wave filter10 Mar 2026US 12,574,016 B2Changzhou Chemsemi Co., Ltd.
- Apparatus and techniques for jammer signal filtering27 Aug 2026US 2026/0254440 A1QUALCOMM Incorporated
- Bandpass filter18 Jun 2026US 2026/0172004 A1Mitsubishi Electric Corporation
- Switch-capacitor filter for receiver baseband anti-aliasing signal filtering21 May 2026US 2026/0142670 A1QUALCOMM Incorporated
- Switched capacitor equalizer using integrating amplifier9 Apr 2026US 2026/0100695 A1Korea University Research and Business Foundation
- Fully differential switched capacitor amplifier11 Sep 2025US 2025/0286524 A1Denso Corporation
Most cited
By later US patents
- Switched capacitor analog circuits using polysilicon thin film technology289US 5,589,847 AXerox Corporation · 1996
- Switched capacitor n-path filter136US 4,446,438 AGTE Automatic Electric Inc. · 1984
- High pass switched capacitor filter section130US 4,210,872 AAmerican Microsystems, Inc. · 1980
- Biquadratic switched-capacitor filter using single operational amplifier129US 5,736,895 AIndustrial Technology Research Institute · 1998
- Integral switched capacitor FIR filter/digital-to-analog converter for sigma-delta encoded digital audio127US 5,012,245 AAT&T Bell Laboratories · 1991