H01H 9/0044
Casings
Official title: {Casings; Mountings; Disposition in transformer housing}
H01H9/0044 (Casings) appears on 58 US grants and 71 published applications in this corpus.
Search patents in H01H- Granted patents
- 58
- Published applications
- 71
- Assignees
- 26
- Inventors
- 145
- Latest grant
- 18 Aug 2026
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 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 2 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 3 |
| 2009 | 0 | 1 |
| 2010 | 3 | 3 |
| 2011 | 3 | 3 |
| 2012 | 1 | 2 |
| 2013 | 2 | 2 |
| 2014 | 3 | 2 |
| 2015 | 0 | 8 |
| 2016 | 5 | 10 |
| 2017 | 6 | 6 |
| 2018 | 7 | 1 |
| 2019 | 5 | 1 |
| 2020 | 3 | 1 |
| 2021 | 2 | 2 |
| 2022 | 1 | 3 |
| 2023 | 1 | 4 |
| 2024 | 4 | 7 |
| 2025 | 3 | 5 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- On-load tap changer and tap-changing transformer having an on-load tap changer18 Aug 2026US 12,712,136 B2Maschinenfabrik Reinhausen GmbH
- Electrical switch for an on-load tap changer5 May 2026US 12,620,535 B2Hitachi Energy Ltd
- Tap changer arrangement and a transformer arrangement comprising the tap changer arrangement11 Nov 2025US 12,469,636 B2Hitachi Energy Ltd
- On-load tap changer module9 Sep 2025US 12,412,708 B2Maschinenfabrik Reinhausen GmbH
- Switching module, and on-load tap changer comprising a switching module13 May 2025US 12,300,455 B2Maschinenfabrik Reinhausen GmbH
- Switch pole for electrical systems8 Oct 2026US 2026/0311938 A1
- On-load tap changer cover and on-load tap changer device17 Sep 2026US 2026/0279695 A1Maschinenfabrik Reinhausen GmbH
- Variable shunt phaser with pressure relief mechanism23 Jul 2026US 2026/0213623 A1GM Global Technology Operations LLC
- A vacuum interrupter, a transformer arrangement and a method for monitoring vacuum interrupter8 Jan 2026US 2026/0011514 A1Hitachi Energy Ltd
- On-load tap-changer25 Dec 2025US 2025/0391617 A1West Journey Corporation
Most cited
By later US patents
- Combination of a gas-filled interrupter and oil-filled transformer31US 5,661,280 AABB Power T&D Company Inc. · 1997
- Step switch with selector12US 6,849,813 B1Maschinenfabrik Reinhausen GmbH · 2005
- Thyristor tap changer12US 6,856,122 B2Maschinenfabrik Reinhausen GmbH · 2005
- Electrical gang box with integrated driver9US 10,622,794 B1Elemental LED, Inc. · 2020
- Temperature monitor for electrical switchgear9US 6,052,060 AFilmax, Inc. · 2000