H02H 3/402
Using homopolar quantities
Official title: {using homopolar quantities}
H02H3/402 (Using homopolar quantities) appears on 39 US grants and 17 published applications in this corpus.
Search patents in H02H- Granted patents
- 39
- Published applications
- 17
- Assignees
- 18
- Inventors
- 59
- Latest grant
- 8 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 4 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 2 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 2 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Device, system, and method for double-circuit transmission systems8 Apr 2025US 12,272,943 B2Hitachi Energy Ltd
- Method for identifying element failure in capacitor banks5 Mar 2024US 11,923,676 B2
- Systems and methods for a controlled dynamic MHO distance characteristic9 Aug 2022US 11,411,389 B1General Electric Technology GmbH
- Ground fault protection method and apparatus for photovoltaic station output transmission line7 Jun 2022US 11,355,922 B2North China Electric Power University
- Voltage based method for fault identification in a transmission line apparatus thereof17 Sep 2019US 10,416,221 B2ABB Schweiz AG
- Systems and methods for distributing electric power from a power distribution unit to an electric load19 Jun 2025US 2025/0202225 A1Ovh
- Method for identifying element failure in capacitor banks16 Feb 2023US 2023/0052911 A1Mho Technologies Corp.
- Device, system, and method for double-circuit transmission systems20 Oct 2022US 2022/0337050 A1Hitachi Energy Switzerland AG
- Ground fault protection method and apparatus for photovoltaic station output transmission line30 Dec 2021US 2021/0408781 A1North China Electric Power University
- Phase and ground protection using tilt-limited adaptive quadrilateral characteristic17 Nov 2016US 2016/0334469 A1Schweitzer Engineering Laboratories, Inc.
Most cited
By later US patents
- One-terminal data fault location system and process for locating a fault39US 5,661,664 AABB Power T&D Company Inc. · 1997
- Fault location method for radial transmission and distribution systems38US 4,996,624 ASchweitzer Engineering Laboratories, Inc. · 1991
- Adaptive quadrilateral characteristic distance relay37US 5,796,258 AABB Power T&D Company Inc. · 1998
- Directional element to determine faults on ungrounded power systems35US 6,721,671 B2Schweitzer Engineering Laboratories, Inc. · 2004
- Zero sequence voltage-polarized directional element for protective relays34US 5,694,281 ASchweitzer Engineering Laboratories, Inc. · 1997