H02J 3/44
With means for ensuring correct phase sequence
Official title: with means for ensuring correct phase sequence
H02J3/44 (With means for ensuring correct phase sequence) appears on 187 US grants and 212 published applications in this corpus.
Search patents in H02J- Granted patents
- 187
- Published applications
- 212
- Assignees
- 140
- Inventors
- 515
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 2 | 5 |
| 2007 | 1 | 3 |
| 2008 | 2 | 7 |
| 2009 | 6 | 2 |
| 2010 | 2 | 9 |
| 2011 | 8 | 15 |
| 2012 | 9 | 25 |
| 2013 | 14 | 24 |
| 2014 | 13 | 13 |
| 2015 | 15 | 17 |
| 2016 | 17 | 4 |
| 2017 | 12 | 13 |
| 2018 | 9 | 8 |
| 2019 | 14 | 11 |
| 2020 | 10 | 6 |
| 2021 | 5 | 8 |
| 2022 | 9 | 3 |
| 2023 | 7 | 6 |
| 2024 | 5 | 8 |
| 2025 | 12 | 9 |
| 2026 | 6 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Base station power converter suitable for single-phase power sources16 Jun 2026US 12,658,710 B1One Three Energy, Inc.
- Method and controller for controlling a power converter connected to a grid12 May 2026US 12,627,156 B2GE Vernova Infrastructure Technology LLC
- Apparatus and method for controlling one or more inverters24 Mar 2026US 12,587,019 B2The University of North Carolina at Charlotte
- System and method of linear state estimation of a distribution network from synchronous smart meter and line sensor24 Feb 2026US 12,562,580 B2Aclara Technologies LLC
- Modular and scalable technique for measurement of der/source parameters for multi-phase and multi-source system for ISE and metering applications10 Feb 2026US 12,549,014 B1Eaton Intelligent Power Limited
- Method for switching between grid-following and grid-forming control modes of converter based on latch-like operator24 Sep 2026US 2026/0291227 A1Zhejiang University
- Transfer switch with delayed optimal power transfer17 Sep 2026US 2026/0280335 A1Vertiv Corporation
- Method for controlling synchronization of a converter in a dc link10 Sep 2026US 2026/0269629 A1Hitachi Energy Ltd
- System and method of linear state estimation of a distribution network from synchronous smart meter and line sensor10 Sep 2026US 2026/0269630 A1
- Microinverter, photovoltaic system, and control method30 Jul 2026US 2026/0221778 A1Sungrow Power Supply Co., Ltd.
Most cited
By later US patents
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- Apparatus and method for providing supplemental alternating current from a solar cell array252US 5,898,585 APremier Global Corporation Ltd. · 1999
- Collection of electric power from renewable energy sources via high voltage, direct current systems with conversion and supply to an alternating current transmission network196US 8,212,408 B2Alencon Acquisition Co., LLC. · 2012
- Power conditioning unit183US 8,369,113 B2Enecsys Limited · 2013