H01H 9/0038
Making use of vacuum switches
Official title: {making use of vacuum switches}
H01H9/0038 (Making use of vacuum switches) appears on 79 US grants and 79 published applications in this corpus.
Search patents in H01H- Granted patents
- 79
- Published applications
- 79
- Assignees
- 24
- Inventors
- 149
- Latest grant
- 18 Aug 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 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 1 | 1 |
| 2013 | 1 | 5 |
| 2014 | 2 | 8 |
| 2015 | 8 | 13 |
| 2016 | 8 | 7 |
| 2017 | 6 | 5 |
| 2018 | 7 | 1 |
| 2019 | 2 | 1 |
| 2020 | 3 | 3 |
| 2021 | 2 | 1 |
| 2022 | 2 | 8 |
| 2023 | 3 | 7 |
| 2024 | 6 | 4 |
| 2025 | 11 | 6 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Switch unit16 Dec 2025US 12,500,047 B2Maschinenfabrik Reinhausen GmbH
- Pressure pulse diagnostics of an OLTC11 Nov 2025US 12,469,653 B2Hitachi Energy Ltd
- Driving system for an on-load tap changer28 Oct 2025US 12,456,591 B2Hitachi Energy Ltd
- On-load tap-changer, method for actuating an on-load tap-changer, and tap-changing transformer having an on-load tap-changer23 Apr 2026US 2026/0112539 A1Maschinenfabrik Reinhausen GmbH
- A vacuum interrupter, a transformer arrangement and a method for monitoring vacuum interrupter8 Jan 2026US 2026/0011514 A1Hitachi Energy Ltd
- Dropout recloser1 Jan 2026US 2026/0005509 A1S&C Electric Company
- On-load tap-changer25 Dec 2025US 2025/0391617 A1West Journey Corporation
- Method for actuating an on-load tap changer, and on-load tap changer device4 Dec 2025US 2025/0373155 A1Maschinenfabrik Reinhausen GmbH
Most cited
By later US patents
- Apparatus for protecting vacuum interrupter type on-line tap changer39US 4,388,664 AFuji Electric Co., Ltd. · 1983
- Tap selector39US 6,060,669 AMaschinenfabrik Reinhausen GmbH · 2000
- Load switch for a step transformer29US 5,107,200 AMaschinenfabrik Reinhausen GmbH · 1992
- Vacuum switch bulb type change over switch for on-load tap changer20US 5,594,223 AFuji Electric Co., Ltd. · 1997
- Load selector for step transformers11US 4,978,815 AMaschinenfabrik Reinhausen GmbH · 1990