H02H 9/08
Limitation or suppression of earth fault currents
Official title: Limitation or suppression of earth fault currents, e.g. Petersen coil
H02H9/08 (Limitation or suppression of earth fault currents) appears on 161 US grants and 166 published applications in this corpus.
Search patents in H02H- Granted patents
- 161
- Published applications
- 166
- Assignees
- 128
- Inventors
- 348
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 3 |
| 2004 | 2 | 2 |
| 2005 | 3 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 3 |
| 2008 | 1 | 1 |
| 2009 | 2 | 4 |
| 2010 | 3 | 5 |
| 2011 | 4 | 4 |
| 2012 | 5 | 4 |
| 2013 | 6 | 14 |
| 2014 | 9 | 12 |
| 2015 | 15 | 11 |
| 2016 | 5 | 6 |
| 2017 | 5 | 3 |
| 2018 | 2 | 4 |
| 2019 | 8 | 8 |
| 2020 | 9 | 18 |
| 2021 | 13 | 17 |
| 2022 | 20 | 13 |
| 2023 | 9 | 10 |
| 2024 | 7 | 6 |
| 2025 | 6 | 6 |
| 2026 | 3 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method and device for monitoring a three-phase network operated in a compensated manner for a tuning change of the arc suppression coil13 Jan 2026US 12,525,781 B2HSP Hochspannungsgeräte GmbH
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- Adaptive arc suppression method for ground faults in a combined active and passive distribution network1 Jul 2025US 12,348,036 B2Kunming University of Science and Technology
- Method for balancing, a balancing circuit and an insulation monitoring device for an ungrounded direct-voltage power supply system27 Aug 2026US 2026/0254230 A1Bender GmbH & Co. KG
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- New energy power station grounding protection system, method, electronic device, and storage medium6 Aug 2026US 2026/0229871 A1Shanxi Yingrun New Energy Co., Ltd
- Method and apparatus for controlling arc suppression device28 May 2026US 2026/0149256 A1
- Method and apparatus for controlling arc suppression device28 May 2026US 2026/0149266 A1
Most cited
By later US patents
- Leakage current cancelling circuit for use with electrosurgical instrument498US 3,946,738 A1976
- Power conditioning device and method98US 5,448,443 ASuvon Associates · 1995
- Rectification element and method for resistive switching for non volatile memory device48US 8,351,241 B2The Regents of the University of Michigan · 2013
- Sensitive ground fault detection system for use in compensated electric power distribution networks31US 6,573,726 B1Schweitzer Engineering Laboratories, Inc. · 2003
- High resistance grounding systems for oil well electrical systems25US 6,188,552 B1Eaton Corporation · 2001