H02H 3/17
By means of an auxiliary voltage injected into the installation to be
Official title: by means of an auxiliary voltage injected into the installation to be protected {(using summation current transformers H02H3/33)}
H02H3/17 (By means of an auxiliary voltage injected into the installation to be) appears on 110 US grants and 83 published applications in this corpus.
Search patents in H02H- Granted patents
- 110
- Published applications
- 83
- Assignees
- 82
- Inventors
- 231
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 4 |
| 2010 | 3 | 1 |
| 2011 | 2 | 1 |
| 2012 | 0 | 4 |
| 2013 | 2 | 3 |
| 2014 | 3 | 4 |
| 2015 | 1 | 5 |
| 2016 | 0 | 5 |
| 2017 | 7 | 11 |
| 2018 | 7 | 5 |
| 2019 | 8 | 5 |
| 2020 | 3 | 2 |
| 2021 | 8 | 4 |
| 2022 | 3 | 11 |
| 2023 | 8 | 4 |
| 2024 | 9 | 6 |
| 2025 | 0 | 1 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Earth leakage detecting device, and vehicular power supply system24 Dec 2024US 12,174,267 B2Sanyo Electric Co., Ltd.
- Earth leakage detection device and vehicle power supply system15 Oct 2024US 12,117,502 B2Sanyo Electric Co., Ltd.
- Ground fault circuit interrupter with integrated controller2 Jul 2026US 2026/0188997 A1Hubbell Incorporated
- System and Method for Locating Remote Earth Fault Section in Power Grids26 Feb 2026US 2026/0056239 A1Winter Brothers AB
- Detecting apparatus for circuit breaker and circuit breaker8 Jan 2026US 2026/0011998 A1Schneider Electric Industries SAS
- Device for generating a virtual neutral point11 Sep 2025US 2025/0286389 A1Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Ground fault circuit interrupter with integrated controller19 Dec 2024US 2024/0421586 A1Hubbell Incorporated
Most cited
By later US patents
- Ground fault detector for line-powered telephone network60US 5,774,316 AAdtran, Inc. · 1998
- Method and apparatus for using direct current to detect ground faults in a shielded heater wire51US 6,218,647 B1MSX, Inc. · 2001
- Systems and methods for generator ground fault protection38US 8,405,940 B2Schweitzer Engineering Laboratories, Inc. · 2013
- Method and apparatus for detecting ground faults in a shielded heater wire by sensing electrical arcing36US 6,107,611 AMSX, Inc. · 2000
- Fault detection33US 4,837,519 ASouthern California Edison Company · 1989