H01H 33/52
For interlocking two or more switches
Official title: for interlocking two or more switches
H01H33/52 (For interlocking two or more switches) appears on 36 US grants and 32 published applications in this corpus.
Search patents in H01H- Granted patents
- 36
- Published applications
- 32
- Assignees
- 28
- Inventors
- 87
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 4 | 3 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 0 |
| 2011 | 0 | 3 |
| 2012 | 1 | 2 |
| 2013 | 3 | 3 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 3 | 4 |
| 2017 | 2 | 2 |
| 2018 | 1 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 1 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 2 |
| 2024 | 0 | 2 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Insulated earthing switch for an air insulated or mixed switchgear9 Sep 2025US 12,413,053 B2GE Vernova Infrastructure Technology LLC
- High voltage circuit-breaker26 Aug 2025US 12,400,816 B2Hitachi Energy Ltd
- Apparatus and method for use in a power delivery system1 Apr 2025US 12,266,916 B2Hawker Siddeley Switchgear Limited
- Switch device1 Nov 2022US 11,488,790 B2ABB Schweiz AG
- Architecture for an electrical switching device28 Dec 2021US 11,211,207 B2Schneider Electric Industries SAS
- SubSea Circuit Breaker16 Oct 2025US 2025/0323474 A1ABB Schweiz AG
- Interlock device17 Apr 2025US 2025/0125101 A1ABB Schweiz AG
- Interlock device19 Sep 2024US 2024/0312733 A1ABB Schweiz AG
- An apparatus and method for use in a power delivery system28 Mar 2024US 2024/0106224 A1Hawker Siddeley Switchgear Limited
- Insulated earthing switch for an air insulated or mixed switchgear7 Dec 2023US 2023/0396043 A1General Electric Company
Most cited
By later US patents
- Interlock apparatus of ground switch for vacuum circuit breaker16US 8,395,064 B2LS Industrial Systems Co., Ltd. · 2013
- Mechanical interlock for vertically mounted circuit breakers15US 4,516,100 AWestinghouse Electric Corp. · 1985
- Operating mechanism for electrical switches and fault interrupters8US 5,504,293 AS&C Electric Company · 1996
- Device for interlocking the manual actuation of a switch with the help of locks7US 6,329,615 B1Alstom · 2001
- Switching apparatus and method for varying an impedance of a phase line of a segment of an electrical power line7US 7,639,460 B2Hydro-Quebec · 2009