H01H 33/167
The impedance being inserted only while opening the switch
Official title: {the impedance being inserted only while opening the switch}
H01H33/167 (The impedance being inserted only while opening the switch) appears on 20 US grants and 14 published applications in this corpus.
Search patents in H01H- Granted patents
- 20
- Published applications
- 14
- Assignees
- 19
- Inventors
- 43
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 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 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 2 | 1 |
| 2021 | 0 | 2 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Vacuum circuit breaker12 Apr 2022US 11,302,499 B1Mitsubishi Electric Power Products, Inc.
- Electrical DC switching system22 Dec 2020US 10,872,740 B2ABB Schweiz AG
- Direct current circuit breaker19 Sep 2024US 2024/0313543 A1Mitsubishi Electric Corporation
- Mechanical current cut-off device for high-voltage direct current with a capacitor in a secondary path, facility and method using such a device23 Mar 2023US 2023/0088430 A1Supergrid Institute
- Vacuum circuit breaker7 Apr 2022US 2022/0108852 A1Mitsubishi Electric Power Products, Inc.
- Multi-circuit dc breaking system2 Dec 2021US 2021/0376590 A1Green Energy Institute
- Electronic apparatus27 May 2021US 2021/0159026 A1Uchiya Thermostat Co., Ltd.
Most cited
By later US patents
- Resistor-type disconnecting switch for circuit breaker21US 4,500,762 AMitsubishi Denki Kabushiki Kaisha · 1985
- Circuit-interrupters having shunting capacitance around the separable power contacts with capacitance disconnecting means therefor12US 4,383,150 AWestinghouse Electric Corp. · 1983
- Hybrid circuit breaker12US 8,503,138 B2ABB Research Ltd. · 2013
- Power use circuit breaker and electrical circuit arrangement for electric power generation plant11US 6,751,078 B1Hitachi Electric Systems Co., Ltd. · 2004
- Gas insulated disconnector10US 4,488,021 AMitsubishi Denki Kabushiki Kaisha · 1984