H03J 3/28
Continuous tuning: of more than one resonant circuit simultaneously, the tuning frequencies
Official title: of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
H03J3/28 (Continuous tuning: of more than one resonant circuit simultaneously, the tuning frequencies) appears on 58 US grants and 23 published applications in this corpus.
Search patents in H03J- Granted patents
- 58
- Published applications
- 23
- Assignees
- 43
- Inventors
- 112
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 3 | 4 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 2 | 2 |
| 2009 | 2 | 0 |
| 2010 | 2 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 2 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Bimodal EPR resonator with automatic electrically controlled inter-mode isolation10 Feb 2026US 12,546,838 B2West Virginia University Board of Governors on behalf of West Virginia University
- Low-area, wide range clocking scheme using inductance/capacitance oscillators28 Jan 2025US 12,212,308 B2Synopsys, Inc.
- Digital hybrid load pull system2 Jan 2024US 11,863,163 B1
- Tuning methods for digital hybrid load pull system15 Aug 2023US 11,728,788 B1
- Multi-frequency tuning network system and method1 Nov 2022US 11,487,040 B2Baker Hughes Oilfield Operations LLC
- Bimodal epr resonator with automatic electrically controlled inter-mode isolation12 Sep 2024US 2024/0302462 A1West Virginia University Board of Governors on behalf of West Virginia University
- Low-Area, Wide Range Clocking Scheme using Inductance/Capacitance Oscillators2 Mar 2023US 2023/0063149 A1Synopsys, Inc.
- Multi-frequency tuning network system and method30 Dec 2021US 2021/0405239 A1Baker Hughes Oilfield Operations LLC
- Differential switchable capacitors for radiofrequency power amplifiers29 Oct 2020US 2020/0343857 A1Goodix Technology Inc.
- Signal-Tracking RF Bandstop Filter11 Apr 2019US 2019/0109609 A1The Government of the United States of America, as represented by the Secretary of the Navy
Most cited
By later US patents
- Method and apparatus for tuning and aligning an FM receiver69US 5,428,829 ADelco Electronics Corporation · 1995
- Tuning of a resonant circuit in a communications receiver54US 4,685,150 ADeutsche Thomson-Brandt GmbH · 1987
- Television tuning system with electronic frequency adjustment apparatus42US 4,402,089 ARCA Corporation · 1983
- Self tracking tuner41US 4,334,323 AZenith Radio Corporation · 1982
- Dual conversion transmitter40US 5,410,747 ANEC Corporation · 1995