H02H 3/445
Of dc quantities
Official title: {of DC quantities}
H02H3/445 (Of dc quantities) appears on 68 US grants and 63 published applications in this corpus.
Search patents in H02H- Granted patents
- 68
- Published applications
- 63
- Assignees
- 66
- Inventors
- 178
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 2 | 4 |
| 2013 | 1 | 3 |
| 2014 | 4 | 4 |
| 2015 | 2 | 0 |
| 2016 | 4 | 2 |
| 2017 | 3 | 2 |
| 2018 | 1 | 2 |
| 2019 | 3 | 3 |
| 2020 | 2 | 4 |
| 2021 | 4 | 6 |
| 2022 | 4 | 8 |
| 2023 | 2 | 3 |
| 2024 | 7 | 5 |
| 2025 | 5 | 6 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Adaptive commutation hybrid circuit breaker22 Sep 2026US 12,744,371 B2Schweitzer Engineering Laboratories, Inc.
- Three-rail power supply system16 Dec 2025US 12,496,935 B2Caterpillar Inc.
- Safety device for an electric DC grid, onboard electrical system for a vehicle, vehicle, and DC charging station23 Sep 2025US 12,424,838 B2Mercedes-Benz Group AG
- Protection circuit connecting and disconnecting a DC operated device from a DC power source26 Aug 2025US 12,401,184 B2DC Systems B.V.
- Power cutoff device14 Jan 2025US 12,194,866 B2Panasonic Intellectual Property Management Co., Ltd.
- Current detection arrangement for electric grids23 Jul 2026US 2026/0211013 A1
- System and method for solid state power control with high reverse current26 Mar 2026US 2026/0088602 A1Leach International Corporation
- Adaptive Commutation Hybrid Circuit Breaker18 Dec 2025US 2025/0385508 A1Schweitzer Engineering Laboratories, Inc.
- Intelligent fault isolation device and operating method thereof29 May 2025US 2025/0174984 A1Korea University of Technology and Education Industry-University Cooperation Foundation
- Transmitter for a Packet Energy Transfer System8 May 2025US 2025/0149963 A1VoltServer, Inc.
Most cited
By later US patents
- Method and apparatus for detection and control of dc arc faults184US 8,179,147 B2Enphase Energy, Inc. · 2012
- Shootthrough fault protection system for a voltage source transistor inverter49US 4,331,994 ABorg-Warner Corporation · 1982
- Shootthrough fault protection system for bipolar transistors in a voltage source transistor inverter25US 4,310,866 ABorg-Warner Corporation · 1982
- Inverter apparatus and inverter controlling method having fault protection22US 5,430,636 AMitsubishi Denki Kabushiki Kaisha · 1995
- Device and method for supplying electric power to a load21US 6,222,709 B1Yazaki Corporation · 2001