H02H 3/46
Responsive to frequency deviations
Official title: responsive to frequency deviations
H02H3/46 (Responsive to frequency deviations) appears on 95 US grants and 87 published applications in this corpus.
Search patents in H02H- Granted patents
- 95
- Published applications
- 87
- Assignees
- 75
- Inventors
- 202
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 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 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 3 | 2 |
| 2004 | 2 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 4 |
| 2008 | 2 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 3 |
| 2013 | 0 | 5 |
| 2014 | 3 | 6 |
| 2015 | 6 | 4 |
| 2016 | 3 | 4 |
| 2017 | 2 | 2 |
| 2018 | 3 | 6 |
| 2019 | 4 | 6 |
| 2020 | 6 | 7 |
| 2021 | 8 | 5 |
| 2022 | 6 | 5 |
| 2023 | 8 | 10 |
| 2024 | 4 | 6 |
| 2025 | 9 | 4 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Monitoring assembly and system having a monitoring assembly14 Apr 2026US 12,601,768 B2Truma Geraetetechnik GmbH & Co. KG
- Autonomous method to prevent brownout of subsea electronic modules30 Dec 2025US 12,512,657 B2Robert Bosch GmbH
- Method and device for fault detection16 Sep 2025US 12,416,659 B2Silergy Semiconductor Technology (Hangzhou) LTD
- Arc fault detection in an electrical power distribution system2 Sep 2025US 12,405,299 B2The Boeing Company
- Arc detection system, arc detection method, and recording medium22 Jul 2025US 12,366,611 B2Panasonic Intellectual Property Management Co., Ltd.
- Detection of secondary arc extinction and optimizing auto reclosing on a transmission line30 Apr 2026US 2026/0121396 A1Hitachi Energy Ltd
- Emp protection system12 Mar 2026US 2026/0074515 A1Energy Research Lab Ltd
- Arc fault detection using machine learning12 Jun 2025US 2025/0192537 A1Leviton Manufacturing Co., Inc.
- Method for optimal load shedding for public safety power shutoffs (psps) - addressing partial load shedding and load-importance15 May 2025US 2025/0158406 A1Hitachi, Ltd.
- Arc fault detection in an electrical power distribution system3 Apr 2025US 2025/0110168 A1The Boeing Company
Most cited
By later US patents
- High-frequency surgical instrument357US 4,788,977 AErbe Elektromedizin GmbH · 1988
- Method and apparatus for determining frequency of an alternating current signal of an electric power system82US 6,717,394 B2Eaton Corporation · 2004
- Apparatus providing on-line indication of frequency of an AC electric power system66US 6,519,537 B1Eaton Corporation · 2003
- Automatic transfer control device and frequency monitor38US 4,231,029 AWestinghouse Electric Corp. · 1980
- Load control receiver with line under voltage and line under frequency detection and load shedding34US 7,355,301 B2Cannon Technologies, Inc. · 2008