H02H 3/52
Responsive to the appearance of harmonics
Official title: responsive to the appearance of harmonics
H02H3/52 (Responsive to the appearance of harmonics) appears on 66 US grants and 55 published applications in this corpus.
Search patents in H02H- Granted patents
- 66
- Published applications
- 55
- Assignees
- 54
- Inventors
- 145
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 2 | 0 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 3 |
| 2013 | 3 | 3 |
| 2014 | 2 | 3 |
| 2015 | 3 | 2 |
| 2016 | 0 | 4 |
| 2017 | 7 | 4 |
| 2018 | 1 | 0 |
| 2019 | 2 | 5 |
| 2020 | 4 | 4 |
| 2021 | 5 | 6 |
| 2022 | 5 | 4 |
| 2023 | 3 | 3 |
| 2024 | 4 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Network protector that detects an error condition7 Apr 2026US 12,597,767 B2Eaton Intelligent Power Limited
- Arc fault detection using machine learning18 Feb 2025US 12,230,953 B2Leviton Manufacturing Co., Inc.
- Calculating electric power noise distributions6 Aug 2024US 12,055,576 B2Schweitzer Engineering Laboratories, Inc.
- Power grid protection via transformer neutral blocking systems and triggered phase disconnection14 May 2024US 11,984,720 B2TechHold, LLC
- Abnormality diagnosis device, abnormality diagnosis method, and abnormality diagnosis system9 Apr 2024US 11,953,555 B2Mitsubishi Electric Corporation
- 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.
- Arc fault detection using machine learning12 Jun 2025US 2025/0192537 A1Leviton Manufacturing Co., Inc.
- Transformer protection system using direct current switch circuit13 Mar 2025US 2025/0087990 A1TechHold, LLC
Most cited
By later US patents
- High impedance fault detection apparatus and method252US 4,466,071 AThe Texas A&M University System · 1984
- Differential protection device of a power transformer110US 5,784,233 AEcole Superieure d'Electricite Supelec · 1998
- Rotor fault detector for induction motors63US 4,761,703 AElectric Power Research Institute, Inc. · 1988
- System for power transformer differential protection58US 6,356,421 B1Schweitzer Engineering Labs., Inc. · 2002
- Circuit analyzing system43US 5,383,084 ALeviton Manufacturing Co., Inc. · 1995