H02H 3/347
Using summation current transformers
Official title: using summation current transformers
H02H3/347 (Using summation current transformers) appears on 75 US grants and 63 published applications in this corpus.
Search patents in H02H- Granted patents
- 75
- Published applications
- 63
- Assignees
- 46
- Inventors
- 128
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 3 |
| 2006 | 2 | 4 |
| 2007 | 4 | 5 |
| 2008 | 4 | 3 |
| 2009 | 3 | 1 |
| 2010 | 3 | 5 |
| 2011 | 2 | 2 |
| 2012 | 2 | 1 |
| 2013 | 3 | 3 |
| 2014 | 1 | 2 |
| 2015 | 2 | 0 |
| 2016 | 1 | 2 |
| 2017 | 0 | 1 |
| 2018 | 2 | 3 |
| 2019 | 4 | 2 |
| 2020 | 1 | 3 |
| 2021 | 4 | 4 |
| 2022 | 1 | 2 |
| 2023 | 4 | 4 |
| 2024 | 2 | 3 |
| 2025 | 2 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Modular power supply20 Aug 2024US 12,066,497 B2BAE Systems Controls Inc.
- Ground fault circuit interrupter and detection method for the same6 Aug 2026US 2026/0229870 A1Schneider Electric Industries SAS
- New energy power station grounding protection system, method, electronic device, and storage medium6 Aug 2026US 2026/0229871 A1Shanxi Yingrun New Energy Co., Ltd
- Protection apparatus for protecting a surge protection device22 Jan 2026US 2026/0024715 A1Citel
- Circuit breaker and method25 Dec 2025US 2025/0391619 A1Siemens Aktiengesellschaft
- Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications1 May 2025US 2025/0141209 A1
Most cited
By later US patents
- Circuit interrupter apparatus with a selectable display means56US 4,827,369 AWestinghouse Electric Corp. · 1989
- Leakage current protection device adapted to a wide variety of domestic and international applications48US 6,381,113 B1Technology Research Corporation · 2002
- Ground fault protection circuit for multiple loads with separate GFCI branches and a common neutral for the GFCI electronics39US 6,021,034 ALeviton Manufacturing Co., Inc. · 2000
- Ground fault apparatus and protection system28US 4,233,640 AGeneral Electric Company · 1980
- Apparatus, method, and system for monitoring leakage current and detecting fault conditions in electrical systems25US 8,605,394 B2Musco Corporation · 2013