H01H 33/166
The impedance being inserted only while closing the switch
Official title: {the impedance being inserted only while closing the switch}
H01H33/166 (The impedance being inserted only while closing the switch) appears on 52 US grants and 18 published applications in this corpus.
Search patents in H01H- Granted patents
- 52
- Published applications
- 18
- Assignees
- 31
- Inventors
- 106
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 2 | 2 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 3 |
| 2025 | 1 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Vacuum circuit breaker25 Aug 2026US 12,718,997 B2Mitsubishi Electric Corporation
- Electrical switching arrangement11 Aug 2026US 12,706,257 B2Eaton Intelligent Power Limited
- Relay switch device integrated with pre-charge system18 Feb 2025US 12,230,465 B2LG Energy Solution, Ltd.
- Gas circuit breaker6 Aug 2024US 12,057,278 B2Mitsubishi Electric Corporation
- High-voltage power switch with closing resistor arrangement21 Feb 2023US 11,587,748 B2Siemens Energy Global GmbH & Co. KG
- Relay Switch Device Integrated With Pre-Charge System22 May 2025US 2025/0166952 A1LG Energy Solution, Ltd.
- Vacuum circuit breaker7 Nov 2024US 2024/0371585 A1Mitsubishi Electric Corporation
- Electrical switching arrangement31 Oct 2024US 2024/0363292 A1Eaton Intelligent Power Limited
- Vacuum circuit breaker11 Jul 2024US 2024/0234057 A1Mitsubishi Electric Corporation
- Relay Switch Device Integrated With Pre-Charge System5 Oct 2023US 2023/0317392 A1LG Energy Solution, Ltd.
Most cited
By later US patents
- Puffer type gas circuit breaker24US 4,009,458 AHitachi, Ltd. · 1977
- Device for switching in a resistance when a circuit breaker closes a circuit17US 4,338,500 ASociete Anonyme dite: Delle-Alsthom · 1982
- Electrical switch with means for switching an auxiliary resistance into the circuit controlled thereby14US 4,072,836 ABBC Brown, Boveri & Company, Limited · 1978
- Compressed gas circuit-breaker13US 4,421,962 AAlsthom-Atlantique · 1983
- Modular closing resistor13US 5,245,145 AABB Power T&D Company Inc. · 1993