H03C 1/08
Amplitude modulation: by means of variable impedance element
Official title: by means of variable impedance element (H03C1/28 - H03C1/34, H03C1/46 - H03C1/52, H03C1/62 take precedence)
H03C1/08 (Amplitude modulation: by means of variable impedance element) appears on 37 US grants and 27 published applications in this corpus.
Search patents in H03C- Granted patents
- 37
- Published applications
- 27
- Assignees
- 32
- Inventors
- 49
- Latest grant
- 2 Aug 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 2 |
| 2003 | 2 | 1 |
| 2004 | 2 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 2 |
| 2007 | 3 | 5 |
| 2008 | 3 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 3 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 3 |
| 2016 | 3 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for managing the operation of an object that is able to contactlessly communicate with a reader2 Aug 2022US 11,403,502 B2STMicroelectronics International N. V.
- Programmable power amplifier1 Sep 2020US 10,763,805 B2EM Microelectronic-Marin SA
- Method for managing the operation of an object that is able to contactlessly communicate with a reader13 Aug 2019US 10,380,474 B2STMicroelectronics International N. V.
- Multi-step drive signal for PIN diode based RF amplitude modulators30 Jan 2018US 9,882,529 B2Honeywell International Inc.
- Radio frequency identification (RFID) tag having multiple antennas6 Dec 2016US 9,514,402 B1Electronics and Telecommunications Research Instit
- Multiport interferometric transmitter for concurrent dual-band and dual-polarized transmission and methods thereof16 Oct 2025US 2025/0323671 A1Huawei Technologies Canada Co., Ltd.
- Programmable power amplifier2 Apr 2020US 2020/0106408 A1EM Microelectronic-Marin SA
- Method for Managing the Operation of an Object that is Able to Contactlessly Communicate with a Reader24 Oct 2019US 2019/0325283 A1STMicroelectronics International N. V.
- Method for Managing the Operation of an Object that is Able to Contactlessly Communicate with a Reader31 Mar 2016US 2016/0092762 A1STMicroelectronics International N. V.
- Multi-step drive signal for pin diode based rf amplitude modulators3 Dec 2015US 2015/0349713 A1Honeywell International Inc.
Most cited
By later US patents
- Amorphous silicon varactors as rf amplitude modulators and their application to acoustic ink printers28US 4,782,350 AXerox Corporation · 1988
- Contactless IC card system15US 6,198,361 B1Sony Corporation · 2001
- Low level modulation system for a radio transmitter13US 4,147,985 A1979
- Low current vector modulator13US 5,392,009 AAmerican Nucleonics Corporation · 1995
- Inductive modulator system9US 4,902,987 A1990