H01H 33/002
Very heavy-current switches
Official title: {Very heavy-current switches (H01H33/02 - H01H33/98 take precedence)}
H01H33/002 (Very heavy-current switches) appears on 86 US grants and 21 published applications in this corpus.
Search patents in H01H- Granted patents
- 86
- Published applications
- 21
- Assignees
- 51
- Inventors
- 155
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 2 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 2 | 3 |
| 2015 | 1 | 2 |
| 2016 | 2 | 2 |
| 2017 | 2 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- High-voltage system test measurement systems and methods14 Oct 2025US 12,444,556 B2Gillig LLC
- Circuit breaker12 Jul 2022US 11,387,631 B2Mitsubishi Electric Corporation
- Current protection device with mutual reactor22 Sep 2020US 10,784,673 B2Varian Semiconductor Equipment Associates, Inc.
- Pneumatically operable current protection device for a fault current limiter27 Aug 2019US 10,396,548 B2Varian Semiconductor Equipment Associates, Inc.
- Superconducting DC circuit breaker using arcing induction6 Aug 2019US 10,373,784 B2Industry-Academic Cooperation Foundation, Chosun University
- High-voltage system test measurement systems and methods7 Jan 2021US 2021/0005410 A1Gillig LLC
- Circuit breaker20 Aug 2020US 2020/0263934 A1Mitsubishi Electric Corporation
- Current protection device with mutual reactor21 Feb 2019US 2019/0058318 A1Varian Semiconductor Equipment Associates, Inc.
- Pneumatically operable current protection device for a fault current limiter2 Aug 2018US 2018/0219372 A1Varian Semiconductor Equipment Associates, Inc.
- Superconducting dc circuit breaker using arcing induction2 Nov 2017US 2017/0316894 A1Industry-Academic Cooperation Foundation, Chosun University
Most cited
By later US patents
- Switch for very large DC currents31US 4,433,607 AWestinghouse Electric Corp. · 1984
- Rotary switch for switching very large DC currents17US 4,426,562 AWestinghouse Electric Corp. · 1984
- Hybrid current limiter having superconductor windings15US 5,153,804 AGEC Alsthom SA · 1992
- Bellows type shorting switch14US 3,950,628 AWestinghouse Electric Corp. · 1976
- Persistent current switch including electrodes forming parallel conductive and superconductive paths14US 4,021,633 AHitachi, Ltd. · 1977