H02H 3/32
Involving comparison of the voltage or current values at corresponding points in
Official title: involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
H02H3/32 (Involving comparison of the voltage or current values at corresponding points in) appears on 1,337 US grants and 1,089 published applications in this corpus.
Search patents in H02H- Granted patents
- 1,337
- Published applications
- 1,089
- Assignees
- 505
- Inventors
- 1,849
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 28 | 0 |
| 1977 | 27 | 0 |
| 1978 | 16 | 0 |
| 1979 | 13 | 0 |
| 1980 | 14 | 0 |
| 1981 | 11 | 0 |
| 1982 | 19 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 10 | 0 |
| 1987 | 8 | 0 |
| 1988 | 9 | 0 |
| 1989 | 11 | 0 |
| 1990 | 9 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 14 | 0 |
| 1994 | 12 | 0 |
| 1995 | 14 | 0 |
| 1996 | 17 | 0 |
| 1997 | 11 | 0 |
| 1998 | 17 | 0 |
| 1999 | 29 | 0 |
| 2000 | 18 | 0 |
| 2001 | 21 | 3 |
| 2002 | 23 | 28 |
| 2003 | 34 | 26 |
| 2004 | 35 | 39 |
| 2005 | 25 | 30 |
| 2006 | 25 | 32 |
| 2007 | 35 | 41 |
| 2008 | 30 | 39 |
| 2009 | 33 | 31 |
| 2010 | 31 | 51 |
| 2011 | 40 | 28 |
| 2012 | 24 | 44 |
| 2013 | 39 | 46 |
| 2014 | 31 | 44 |
| 2015 | 39 | 31 |
| 2016 | 35 | 55 |
| 2017 | 40 | 57 |
| 2018 | 46 | 63 |
| 2019 | 63 | 46 |
| 2020 | 63 | 60 |
| 2021 | 62 | 53 |
| 2022 | 51 | 48 |
| 2023 | 54 | 62 |
| 2024 | 49 | 44 |
| 2025 | 51 | 47 |
| 2026 | 22 | 41 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Self-test auto monitor ground fault circuit interrupter (GFCI) with power denial6 Oct 2026US 12,754,232 B2Hubbell Incorporated
- Ground fault detection in AC systems using digital signal processing6 Oct 2026US 12,756,175 B2Amber Semiconductor, Inc.
- Leakage protection circuit and lighting system1 Sep 2026US 12,726,013 B2Silergy Semiconductor Technology (Hangzhou) LTD
- Method for checking the adequacy at the residual currents of differential circuit breakers18 Aug 2026US 12,712,355 B2Chauvin Arnoux
- Protective wiring device11 Aug 2026US 12,706,266 B2Pass & Seymour, Inc.
- Constant current startup regulator for fault managed power24 Sep 2026US 2026/0291203 A1Cisco Technology, Inc.
- Method for processing a current transformer signal24 Sep 2026US 2026/0291210 A1Schneider Electric Industries SAS
- Leakage protection device and electrical device27 Aug 2026US 2026/0253828 A1Sensata Technologies Changzhou Co., Ltd.
- Frequency dependent ground fault interrupt13 Aug 2026US 2026/0235699 A1Pass & Seymour, Inc.
- Power receiving and transforming equipment leakage current/stray current digital safety control system13 Aug 2026US 2026/0237996 A1Technomirai Co., Ltd.
Most cited
By later US patents
- Electronic circuit breaker with protection against sputtering arc faults and ground faults252US 5,224,006 AWestinghouse Electric Corp. · 1993
- Apparatus and method of detecting ground fault in power conversion system248US 6,927,955 B2Canon Kabushiki Kaisha · 2005
- Circuit breaker panel241US 8,681,463 B2Edison Global Circuits, LLC · 2014
- Arc fault detector with circuit interrupter222US 6,433,978 B1Leviton Manufacturing Co., Inc. · 2002
- Self testing circuit breaker ground fault and sputtering arc trip unit204US 5,459,630 AEaton Corporation · 1995