H01H 2009/0061
Monitoring tap change switching devices
Official title: {Monitoring tap change switching devices}
H01H2009/0061 (Monitoring tap change switching devices) appears on 75 US grants and 76 published applications in this corpus.
Search patents in H01H- Granted patents
- 75
- Published applications
- 76
- Assignees
- 32
- Inventors
- 177
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 2 | 0 |
| 2004 | 1 | 4 |
| 2005 | 2 | 2 |
| 2006 | 3 | 2 |
| 2007 | 0 | 2 |
| 2008 | 3 | 2 |
| 2009 | 1 | 2 |
| 2010 | 1 | 2 |
| 2011 | 2 | 2 |
| 2012 | 1 | 3 |
| 2013 | 1 | 0 |
| 2014 | 5 | 4 |
| 2015 | 3 | 5 |
| 2016 | 1 | 2 |
| 2017 | 3 | 6 |
| 2018 | 2 | 4 |
| 2019 | 2 | 2 |
| 2020 | 7 | 1 |
| 2021 | 3 | 4 |
| 2022 | 0 | 11 |
| 2023 | 3 | 3 |
| 2024 | 8 | 5 |
| 2025 | 5 | 6 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Switch assembly comprising an on-load tap changer and a drive system14 Apr 2026US 12,603,235 B2Maschinenfabrik Reinhausen GmbH
- Switch unit16 Dec 2025US 12,500,047 B2Maschinenfabrik Reinhausen GmbH
- Pressure pulse diagnostics of an OLTC11 Nov 2025US 12,469,653 B2Hitachi Energy Ltd
- On-load tap changer and method for actuating an on-load tap changer21 Oct 2025US 12,451,299 B2Maschinenfabrik Reinhausen GmbH
- Switch device30 Sep 2025US 12,431,306 B2Kabushiki Kaisha Tokai Rika Denki Seisakusho
- A vacuum interrupter, a transformer arrangement and a method for monitoring vacuum interrupter8 Jan 2026US 2026/0011514 A1Hitachi Energy Ltd
- Method for actuating an on-load tap changer, and on-load tap changer device4 Dec 2025US 2025/0373155 A1Maschinenfabrik Reinhausen GmbH
- Method for actuating an on-load tap-changer, and on-load tap-changer device30 Oct 2025US 2025/0336622 A1Maschinenfabrik Reinhausen GmbH
- State analysis of an on-load tap changer24 Jul 2025US 2025/0237700 A1Maschinenfabrik Reinhausen GmbH
- Pressure pulse diagnostics of an oltc29 May 2025US 2025/0174416 A1Hitachi Energy Ltd
Most cited
By later US patents
- Method for determining wear and other characteristics of electrodes in high voltage equipment118US 6,448,758 B1General Electric Company · 2002
- Vibro-acoustic signature treatment process in high-voltage electromechanical switching system34US 6,215,408 B1Hydro-Quebec · 2001
- Method of monitoring a tap selector23US 6,124,726 AMaschinenfabrik Reinhausen GmbH · 2000
- Fault interrupting and reclosing device20US 8,334,738 B2S&C Electric Company · 2012
- Tap position determination based on regular impedance characteristics19US 5,550,459 ASiemens Energy & Automation, Inc. · 1996