H02H 3/44
Responsive to the rate of change of electrical quantities
Official title: responsive to the rate of change of electrical quantities
H02H3/44 (Responsive to the rate of change of electrical quantities) appears on 376 US grants and 286 published applications in this corpus.
Search patents in H02H- Granted patents
- 376
- Published applications
- 286
- Assignees
- 210
- Inventors
- 722
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 13 | 3 |
| 2002 | 17 | 9 |
| 2003 | 21 | 14 |
| 2004 | 4 | 14 |
| 2005 | 12 | 5 |
| 2006 | 12 | 12 |
| 2007 | 14 | 12 |
| 2008 | 6 | 8 |
| 2009 | 9 | 7 |
| 2010 | 6 | 3 |
| 2011 | 5 | 7 |
| 2012 | 6 | 11 |
| 2013 | 5 | 7 |
| 2014 | 11 | 17 |
| 2015 | 9 | 7 |
| 2016 | 14 | 11 |
| 2017 | 9 | 11 |
| 2018 | 10 | 12 |
| 2019 | 12 | 12 |
| 2020 | 10 | 13 |
| 2021 | 20 | 19 |
| 2022 | 9 | 17 |
| 2023 | 11 | 14 |
| 2024 | 19 | 20 |
| 2025 | 17 | 16 |
| 2026 | 7 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adaptive commutation hybrid circuit breaker22 Sep 2026US 12,744,371 B2Schweitzer Engineering Laboratories, Inc.
- Circuit breaker device and method of triggering the circuit breaker device if current and voltage threshold values are exceeded in a time window4 Aug 2026US 12,700,725 B2Siemens Aktiengesellschaft
- Method and system for short-circuit protection of emergency starting power supply16 Jun 2026US 12,658,687 B2Shenzhen Grepow Battery Co., Ltd
- Computer-implemented method of power line protection, intelligent electronic device and electric power system5 May 2026US 12,620,797 B2Hitachi Energy Ltd
- System for monitoring field device14 Apr 2026US 12,603,488 B2Beckhoff Automation GmbH
- Method, device and arrangement for surge protection6 Aug 2026US 2026/0229987 A1
- Current detection arrangement for electric grids23 Jul 2026US 2026/0211013 A1
- Tripping energy loads during under-frequency events based on deceleration of rate of change of frequency9 Apr 2026US 2026/0100582 A1
- System and method for solid state power control with high reverse current26 Mar 2026US 2026/0088602 A1Leach International Corporation
- Device and method for controlling the discharge of a dc link capacitor8 Jan 2026US 2026/0012032 A1Robert Bosch GmbH
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
- Self testing circuit breaker ground fault and sputtering arc trip unit204US 5,459,630 AEaton Corporation · 1995
- Intelligent ground fault circuit interrupter185US 5,600,524 ALeviton Manufacturing Co., Inc. · 1997
- Method and apparatus for detection and control of dc arc faults184US 8,179,147 B2Enphase Energy, Inc. · 2012
- Safe exposed conductor power distribution system178US 8,781,637 B2VoltServer, Inc. · 2014