H02H 3/38
Responsive to both voltage and current
Official title: responsive to both voltage and current; responsive to phase angle between voltage and current
H02H3/38 (Responsive to both voltage and current) appears on 329 US grants and 273 published applications in this corpus.
Search patents in H02H- Granted patents
- 329
- Published applications
- 273
- Assignees
- 200
- Inventors
- 677
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 9 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 9 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 6 | 12 |
| 2004 | 6 | 4 |
| 2005 | 5 | 0 |
| 2006 | 4 | 7 |
| 2007 | 3 | 3 |
| 2008 | 3 | 5 |
| 2009 | 2 | 2 |
| 2010 | 1 | 8 |
| 2011 | 4 | 5 |
| 2012 | 3 | 6 |
| 2013 | 5 | 13 |
| 2014 | 15 | 10 |
| 2015 | 8 | 14 |
| 2016 | 8 | 19 |
| 2017 | 12 | 15 |
| 2018 | 13 | 14 |
| 2019 | 15 | 27 |
| 2020 | 24 | 22 |
| 2021 | 29 | 13 |
| 2022 | 20 | 23 |
| 2023 | 21 | 13 |
| 2024 | 9 | 18 |
| 2025 | 10 | 6 |
| 2026 | 7 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems, apparatuses, and methods for safe communication and data transmission in high voltage power systems18 Aug 2026US 12,712,526 B2Panduit Corp.
- Circuit-breaker device and method28 Jul 2026US 12,695,293 B2Siemens Aktiengesellschaft
- Method and system for short-circuit protection of emergency starting power supply16 Jun 2026US 12,658,687 B2Shenzhen Grepow Battery Co., Ltd
- Network protector for secondary distribution network that includes distributed energy resources31 Mar 2026US 12,592,556 B2Eaton Intelligent Power Limited
- Switch device31 Mar 2026US 12,592,695 B2Autonetworks Technologies, Ltd.
- New energy power station grounding protection system, method, electronic device, and storage medium6 Aug 2026US 2026/0229871 A1Shanxi Yingrun New Energy Co., Ltd
- Switch Mode Pre-Charge Circuit9 Jul 2026US 2026/0196851 A1LG Energy Solution, Ltd.
- Micro-electromechanical switch systems with self-testing capability25 Jun 2026US 2026/0177619 A1Analog Devices International Unlimited Company
- Micro-electromechanical switch systems with diagnostic capability using digital model25 Jun 2026US 2026/0177620 A1Analog Devices International Unlimited Company
- Systems with self-prognosis and control capability using micro-electromechanical switch25 Jun 2026US 2026/0179859 A1Analog Devices International Unlimited Company
Most cited
By later US patents
- Pump control responsive to voltage-current phase angle138US 5,362,206 AAutomation Associates, Inc. · 1994
- Pump and electric motor protector94US 4,841,404 ASpring Valley Associates, Inc. · 1989
- Sequence based network protector relay with forward overcurrent protection and antipumping feature90US 5,822,165 AEaton Corporation · 1998
- Water pump protector unit86US 4,885,655 ASpring Valley Associates, Inc. · 1989
- Pump controller79US 6,534,947 B2Sta-Rite Industries, Inc. · 2003