H02H 7/042
For current transformers
Official title: {for current transformers}
H02H7/042 (For current transformers) appears on 35 US grants and 33 published applications in this corpus.
Search patents in H02H- Granted patents
- 35
- Published applications
- 33
- Assignees
- 31
- Inventors
- 106
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 3 |
| 2015 | 0 | 3 |
| 2016 | 2 | 1 |
| 2017 | 2 | 6 |
| 2018 | 6 | 2 |
| 2019 | 3 | 4 |
| 2020 | 3 | 2 |
| 2021 | 3 | 2 |
| 2022 | 2 | 3 |
| 2023 | 3 | 1 |
| 2024 | 3 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-impedance differential protection using a diversity of signals16 Sep 2025US 12,418,168 B2Schweitzer Engineering Laboratories, Inc.
- Measuring method and high-voltage transducer with clean air4 Jun 2024US 12,002,617 B2HSP Hochspannungsgeräte GmbH
- Protection of low-voltage distribution networks5 Mar 2024US 11,921,170 B2Electronic Sazan Fan Aria Company
- Control system for transformer protection system5 Mar 2024US 11,923,129 B2TechHold, LLC
- Protective relay and method for detecting disconnection of protective relay4 Jul 2023US 11,695,267 B2Ls Electric Co., Ltd.
- Method and device for fault detection and method and system for monitoring and/or performing a protection function, for a current transformer19 Feb 2026US 2026/0050047 A1Siemens Aktiengesellschaft
- High-impedance differential protection using a diversity of signals25 Jul 2024US 2024/0250518 A1Schweitzer Engineering Laboratories, Inc.
- Protective relay and method for detecting disconnection of protective relay5 Jan 2023US 2023/0006436 A1Ls Electric Co., Ltd.
- Control system for transformer protection system11 Aug 2022US 2022/0254565 A1TechHold, LLC
- Protection of low-voltage distribution networks28 Jul 2022US 2022/0236339 A1Electronic Sazan Fan Aria Company
Most cited
By later US patents
- Current harvesting transformer with protection from high currents16US 9,984,818 B2Sentient Energy, Inc. · 2018
- Current transformer protection device9US 4,521,822 AHydro-Quebec · 1985
- Open circuit current transformer protection circuit6US 4,466,039 AMcGraw-Edison Company · 1984
- Molded case circuit breaker with cooling and protection for the static tripping unit6US 4,549,242 AMerlin Gerin · 1985
- Method and system for improved operation of power grid components in the presence of direct current (DC)4US 10,985,559 B2TechHold, LLC · 2021