H02J 3/04
Arrangements for connecting networks of the same frequency but supplied from different
Official title: Arrangements for connecting networks of the same frequency but supplied from different sources
H02J3/04 (Arrangements for connecting networks of the same frequency but supplied from different) appears on 628 US grants and 736 published applications in this corpus.
Search patents in H02J- Granted patents
- 628
- Published applications
- 736
- Assignees
- 386
- Inventors
- 1,604
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 0 |
| 2003 | 2 | 4 |
| 2004 | 1 | 7 |
| 2005 | 3 | 7 |
| 2006 | 2 | 2 |
| 2007 | 3 | 10 |
| 2008 | 3 | 8 |
| 2009 | 7 | 2 |
| 2010 | 9 | 5 |
| 2011 | 6 | 19 |
| 2012 | 6 | 20 |
| 2013 | 8 | 28 |
| 2014 | 21 | 35 |
| 2015 | 19 | 47 |
| 2016 | 22 | 39 |
| 2017 | 36 | 45 |
| 2018 | 39 | 39 |
| 2019 | 50 | 44 |
| 2020 | 47 | 66 |
| 2021 | 46 | 51 |
| 2022 | 46 | 66 |
| 2023 | 56 | 64 |
| 2024 | 59 | 44 |
| 2025 | 51 | 57 |
| 2026 | 32 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Thermal energy storage system coupled with a solid oxide electrolysis system6 Oct 2026US 12,753,710 B2Rondo Energy, Inc.
- Method and system for distributing electricity over lines29 Sep 2026US 12,749,895 B2
- Thermal energy storage system coupled with thermal power cycle systems8 Sep 2026US 12,729,632 B1Rondo Energy, Inc.
- Thermal energy storage systems for use in material processing1 Sep 2026US 12,723,524 B2Rondo Energy, Inc.
- Synchronization control method and system for microgrid group1 Sep 2026US 12,726,027 B2Beijing Goldwind Carbon Neutral Energy Co., Ltd.
- Loading calculation17 Sep 2026US 2026/0280292 A1S&C Electric Company
- Systems and Methods for Resynchronization of Micro-Grids with Larger Power Grids17 Sep 2026US 2026/0280293 A1ABB Schweiz AG
- Method and system for dynamic adjustment of power synchronisation17 Sep 2026US 2026/0280294 A1GE Vernova Infrastructure Technology LLC
- Method of detecting measurement errors in intelligent electronic devices3 Sep 2026US 2026/0261121 A1Myongji University Industry and Academia Cooperation
- Method and system for solving dynamic security space of distribution networks aggregated by virtual power plants13 Aug 2026US 2026/0236810 A1Southeast University
Most cited
By later US patents
- Generalized grid security framework192US 8,924,033 B2Alstom Grid · 2014
- Stand-alone electrical system for large motor loads171US 7,388,303 B2ConocoPhillips Company · 2008
- Battery testing and classification162US 6,526,361 B1Snap-On Equipment GmbH · 2003
- Electrical power distribution monitoring system and method161US 5,963,457 AHitachi, Ltd. · 1999
- Dynamic distributed power grid control system147US 8,401,709 B2Spirae, Inc. · 2013