H02H 3/50
Responsive to the appearance of abnormal wave forms
Official title: responsive to the appearance of abnormal wave forms, e.g. AC in DC installations
H02H3/50 (Responsive to the appearance of abnormal wave forms) appears on 154 US grants and 123 published applications in this corpus.
Search patents in H02H- Granted patents
- 154
- Published applications
- 123
- Assignees
- 106
- Inventors
- 323
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 1 |
| 2003 | 4 | 0 |
| 2004 | 2 | 2 |
| 2005 | 1 | 2 |
| 2006 | 1 | 3 |
| 2007 | 1 | 2 |
| 2008 | 3 | 1 |
| 2009 | 0 | 3 |
| 2010 | 2 | 3 |
| 2011 | 1 | 2 |
| 2012 | 3 | 4 |
| 2013 | 3 | 4 |
| 2014 | 3 | 4 |
| 2015 | 3 | 4 |
| 2016 | 1 | 6 |
| 2017 | 8 | 6 |
| 2018 | 2 | 6 |
| 2019 | 4 | 9 |
| 2020 | 9 | 12 |
| 2021 | 12 | 9 |
| 2022 | 11 | 10 |
| 2023 | 9 | 10 |
| 2024 | 8 | 11 |
| 2025 | 6 | 3 |
| 2026 | 7 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System for protecting an electrical circuit for an aircraft25 Aug 2026US 12,716,959 B2Airbus Operations GmbH
- Circuit breaker device and method11 Aug 2026US 12,706,452 B2Siemens Aktiengesellschaft
- 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
- Monitoring assembly and system having a monitoring assembly14 Apr 2026US 12,601,768 B2Truma Geraetetechnik GmbH & Co. KG
- Network protector that detects an error condition7 Apr 2026US 12,597,767 B2Eaton Intelligent Power Limited
- Abnormality diagnosis device and abnormality diagnosis method30 Jul 2026US 2026/0219320 A1Mitsubishi Electric Corporation
- Power supply system16 Jul 2026US 2026/0204888 A1Kaneka Corporation
- Detection or prevention of electrical secondary arc in an electric power delivery system9 Jul 2026US 2026/0196822 A1Schweitzer Engineering Laboratories, Inc.
- Image forming apparatus using motor and heater5 Feb 2026US 2026/0036932 A1Canon Kabushiki Kaisha
- Ac voltage and dc voltage mixing protection1 Jan 2026US 2026/0005512 A1Visteon Global Technologies, Inc.
Most cited
By later US patents
- High impedance fault detection apparatus and method252US 4,466,071 AThe Texas A&M University System · 1984
- Method for generating a fault indication signal125US 5,854,590 ASiemens Aktiengesellschaft · 1998
- Differential protection device of a power transformer110US 5,784,233 AEcole Superieure d'Electricite Supelec · 1998
- System, apparatus and method for detection of electrical faults94US 7,282,921 B2Isra-Juk Electronics Ltd. · 2007
- Power cable arcing fault detection system72US 5,047,724 ABell Communications Research, Inc. · 1991