H02J 4/25
For transfer of electric power between ac and dc networks
Official title: for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system
H02J4/25 (For transfer of electric power between ac and dc networks) appears on 784 US grants and 947 published applications in this corpus.
Search patents in H02J- Granted patents
- 784
- Published applications
- 947
- Assignees
- 497
- Inventors
- 1,849
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 8 |
| 2003 | 7 | 9 |
| 2004 | 5 | 10 |
| 2005 | 1 | 6 |
| 2006 | 2 | 10 |
| 2007 | 4 | 10 |
| 2008 | 4 | 24 |
| 2009 | 8 | 17 |
| 2010 | 16 | 25 |
| 2011 | 9 | 42 |
| 2012 | 21 | 35 |
| 2013 | 21 | 65 |
| 2014 | 32 | 86 |
| 2015 | 46 | 80 |
| 2016 | 61 | 90 |
| 2017 | 82 | 72 |
| 2018 | 83 | 76 |
| 2019 | 87 | 47 |
| 2020 | 57 | 61 |
| 2021 | 45 | 26 |
| 2022 | 43 | 35 |
| 2023 | 32 | 32 |
| 2024 | 28 | 28 |
| 2025 | 28 | 29 |
| 2026 | 20 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Feedback algorithms for manual bailout systems for surgical instruments15 Sep 2026US 12,733,931 B2Cilag GmbH International
- DC power distribution system and voltage stabilizer15 Sep 2026US 12,738,731 B2TMEIC Corporation
- AC/DC substation configurable between charging and powering modes8 Sep 2026US 12,728,735 B2Caterpillar Inc.
- Power supply equipment and method of operating the same4 Aug 2026US 12,700,728 B2Delta Electronics, Inc.
- Medium-voltage power conversion system and distributed medium-voltage power conversion system21 Jul 2026US 12,689,307 B2Delta Electronics, Inc.
- Device Having a Multimode Antenna With Variable Width of Conductive Wire17 Sep 2026US 2026/0279661 A1NuCurrent, Inc.
- Power supply system and office integrated power supply device27 Aug 2026US 2026/0254257 A1Anker Innovations Technology Co., Ltd.
- Power conversion device27 Aug 2026US 2026/0254366 A1Mitsubishi Electric Corporation
- Residential DC Voltage Infrastructure30 Jul 2026US 2026/0221764 A1
- Voltage compensation system and uninterruptible power supply16 Jul 2026US 2026/0204942 A1Delta Electronics, Inc.
Most cited
By later US patents
- Modular powered surgical instrument with detachable shaft assemblies1,623US 9,743,929 B2Ethicon, Inc. · 2017
- Feedback algorithms for manual bailout systems for surgical instruments1,521US 10,028,761 B2Ethicon, Inc. · 2018
- Surgical stapling instrument system1,519US 9,750,499 B2Ethicon, Inc. · 2017
- Surgical instrument comprising a rotatable shaft1,314US 10,201,364 B2Ethicon, Inc. · 2019
- Motion sensitive and capacitor powered handheld device1,026US 9,153,994 B2Welch Allyn, Inc. · 2015