H03C 3/12
By means of a variable reactive element
Official title: by means of a variable reactive element
H03C3/12 (By means of a variable reactive element) appears on 145 US grants and 46 published applications in this corpus.
Search patents in H03C- Granted patents
- 145
- Published applications
- 46
- Assignees
- 83
- Inventors
- 241
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 8 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 2 |
| 2004 | 3 | 2 |
| 2005 | 1 | 4 |
| 2006 | 1 | 2 |
| 2007 | 2 | 2 |
| 2008 | 3 | 5 |
| 2009 | 5 | 8 |
| 2010 | 3 | 0 |
| 2011 | 3 | 1 |
| 2012 | 2 | 2 |
| 2013 | 2 | 1 |
| 2014 | 3 | 4 |
| 2015 | 2 | 2 |
| 2016 | 3 | 3 |
| 2017 | 5 | 2 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multi-gigabit per second frequency-shift keying (FSK) transceiver28 Apr 2026US 12,615,174 B2The Regents of the University of California
- Sensor interface circuit and sensor module9 Apr 2024US 11,954,555 B2Alps Alpine Co., Ltd.
- Systems and methods for frequency-modulation2 Mar 2021US 10,938,344 B1Bestechnic (Shanghai) Co., Ltd.
- Quadrature oscillator, FSK modulator, and optical module19 May 2020US 10,658,974 B2Fujitsu Limited
- Modified tunneling field effect transistors and fabrication methods19 Jun 2018US 10,003,302 B2Globalfoundries Inc.
- Multi-gigabit per second frequency-shift keying (fsk) transceiver5 Jun 2025US 2025/0184194 A1The Regents of the University of California
- Sensor interface circuit and sensor module15 Jun 2023US 2023/0186040 A1Alps Alpine Co., Ltd.
- Quadrature oscillator, fsk modulator, and optical module24 Oct 2019US 2019/0326856 A1Fujitsu Limited
- Modified tunneling field effect transistors and fabrication methods10 Aug 2017US 2017/0230004 A1Globalfoundries Inc.
- Double frequency-shift keying modulating device29 Jun 2017US 2017/0187366 A1National Chi Nan University
Most cited
By later US patents
- Voltage controlled oscillator with frequency sensitivity control84US 4,736,169 AHughes Aircraft Company · 1988
- Direct digital polar modulator54US 6,834,084 B22004
- Battery saving system for a frequency synthesizer51US 4,631,496 AMotorola, Inc. · 1986
- MMIC tunable biphase modulator49US 5,442,327 AMotorola, Inc. · 1995
- Direct QAM modulator39US 5,852,389 ATelecommunications Research Laboratories · 1998