H03H 11/44
Negative impedance converters
Official title: Negative impedance converters (H03H11/42 takes precedence)
H03H11/44 (Negative impedance converters) appears on 39 US grants and 27 published applications in this corpus.
Search patents in H03H- Granted patents
- 39
- Published applications
- 27
- Assignees
- 30
- Inventors
- 77
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 3 | 2 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 0 |
| 2015 | 3 | 1 |
| 2016 | 2 | 0 |
| 2017 | 1 | 2 |
| 2018 | 0 | 3 |
| 2019 | 1 | 0 |
| 2020 | 4 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 2 |
| 2023 | 1 | 0 |
| 2024 | 2 | 6 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Input/output capacitance reduction with negative impedance23 Jun 2026US 12,663,886 B2Intel Corporation
- Plasma processing apparatus, high-frequency power supply circuit, and impedance matching method18 Nov 2025US 12,476,084 B2Kyushu University, National University Corporation
- Method for implementing simulator and impedance multiplier circuit21 Jan 2025US 12,206,379 B2King Fahd University of Petroleum and Minerals
- System for configuring active inductor simulator and multiplier circuit21 Jan 2025US 12,206,380 B2King Fahd University of Petroleum and Minerals
- Active inductive simulator and impedance multiplier31 Dec 2024US 12,184,256 B2King Fahd University of Petroleum and Minerals
- Active inductive simulator and impedance multiplier5 Dec 2024US 2024/0405752 A1King Fahd University of Petroleum and Minerals
- Method for implementing simulator and impedance multiplier circuit5 Dec 2024US 2024/0405753 A1King Fahd University of Petroleum and Minerals
- System for configuring active inductor simulator and multiplier circuit5 Dec 2024US 2024/0405754 A1King Fahd University of Petroleum and Minerals
- Plasma processing device, high-frequency power supply circuit, and impedance matching method11 Apr 2024US 2024/0120179 A1Kyushu University, National University Corporation
- Tunable grounded positive and negative active inductor simulator and impedance multiplier4 Apr 2024US 2024/0113697 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Low voltage bipolar negative impedance converter15US 5,392,002 ANational Semiconductor Corporation · 1995
- Negative impedance network13US 3,986,152 AGeneral Electric Company · 1976
- Differential negative impedance converters and inverters with variable or tunable conversion ratios13US 8,988,173 B2HRL Laboratories, LLC · 2015
- Amplifier device with frequency-response-compensating amplifier reactance, and use of the amplifier device10US 6,573,788 B2Siemens Aktiengesellschaft · 2003
- Electronic transformer9US 4,363,008 ATellabs Oy · 1982