H01H 33/53
Cases
Official title: Cases (for switchgear H02B1/26); Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
H01H33/53 (Cases) appears on 471 US grants and 437 published applications in this corpus.
Search patents in H01H- Granted patents
- 471
- Published applications
- 437
- Assignees
- 190
- Inventors
- 1,160
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 9 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 4 |
| 2002 | 12 | 11 |
| 2003 | 8 | 6 |
| 2004 | 7 | 6 |
| 2005 | 4 | 4 |
| 2006 | 3 | 9 |
| 2007 | 8 | 6 |
| 2008 | 2 | 6 |
| 2009 | 4 | 5 |
| 2010 | 5 | 8 |
| 2011 | 3 | 10 |
| 2012 | 10 | 12 |
| 2013 | 4 | 10 |
| 2014 | 11 | 26 |
| 2015 | 15 | 23 |
| 2016 | 24 | 20 |
| 2017 | 20 | 24 |
| 2018 | 31 | 34 |
| 2019 | 29 | 29 |
| 2020 | 28 | 18 |
| 2021 | 24 | 32 |
| 2022 | 20 | 42 |
| 2023 | 24 | 25 |
| 2024 | 29 | 31 |
| 2025 | 22 | 21 |
| 2026 | 11 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for gas leak detection18 Aug 2026US 12,710,334 B2ABB Schweiz AG
- Multi-contact miniature circuit breaker with reduced arcing28 Jul 2026US 12,695,036 B2Eaton Intelligent Power Limited
- Vacuum circuit breaker28 Jul 2026US 12,695,037 B2Mitsubishi Electric Corporation
- Low-voltage switch pole30 Jun 2026US 12,671,044 B2ABB AB
- Electric circuit breaker device26 May 2026US 12,640,320 B2Daicel Corporation
- Electric circuit breaker device3 Sep 2026US 2026/0260829 A1Daicel Corporation
- Simulation verification method and apparatus for gas density relay27 Aug 2026US 2026/0251713 A1Shanghai Roye Electric Co., Ltd.
- Vacuum circuit breaker6 Aug 2026US 2026/0229431 A1Hd Hyundai Electric Co., Ltd.
- Method for distributing a mixture in a gaseous state30 Jul 2026US 2026/0218856 A1Air Liquide Electronics Systems
- A cassette casing unit of a moulded case circuit breaker (mccb)23 Jul 2026US 2026/0213099 A1Havells India Limited
Most cited
By later US patents
- Subsea switchgear95US 9,450,385 B2Siemens Aktiengesellschaft · 2016
- Gas insulated high-voltage circuit breaker with pneumatic operating mechanism84US 5,187,339 AMerlin Gerin · 1993
- Recloser means for reclosing interrupted high voltage electric circuit means66US 5,175,403 ACooper Power Systems, Inc. · 1992
- Modular, high-voltage, three phase recloser assembly54US 6,198,062 B1Joslyn Hi-Voltage Corporation · 2001
- Diaphragm seal for a high voltage switch environment48US 5,667,060 AAmerace Corporation · 1997