H01F 27/402
Association of measuring or protective means
Official title: {Association of measuring or protective means}
H01F27/402 (Association of measuring or protective means) appears on 501 US grants and 565 published applications in this corpus.
Search patents in H01F- Granted patents
- 501
- Published applications
- 565
- Assignees
- 332
- Inventors
- 1,383
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 6 | 7 |
| 2003 | 6 | 7 |
| 2004 | 6 | 3 |
| 2005 | 6 | 14 |
| 2006 | 6 | 5 |
| 2007 | 6 | 6 |
| 2008 | 7 | 14 |
| 2009 | 8 | 25 |
| 2010 | 12 | 17 |
| 2011 | 10 | 17 |
| 2012 | 8 | 12 |
| 2013 | 13 | 18 |
| 2014 | 18 | 31 |
| 2015 | 20 | 27 |
| 2016 | 21 | 28 |
| 2017 | 17 | 31 |
| 2018 | 23 | 23 |
| 2019 | 30 | 43 |
| 2020 | 37 | 41 |
| 2021 | 24 | 39 |
| 2022 | 33 | 39 |
| 2023 | 41 | 39 |
| 2024 | 36 | 23 |
| 2025 | 25 | 34 |
| 2026 | 16 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integral transformer junction module6 Oct 2026US 12,755,887 B2
- Transformer monitoring management system15 Sep 2026US 12,738,766 B2Fortune Electric Co., Ltd.
- Coil device, power supply device, and detection device25 Aug 2026US 12,715,316 B2IHI Corporation
- Current transformer with improved performance18 Aug 2026US 12,712,123 B2Arbiter Systems, Incorporated
- Adaptive combined approach for intelligent transformer dissolved gas alarm detection11 Aug 2026US 12,704,491 B2GE Vernova Infrastructure Technology LLC
- Air-cell rupture diagnosis method and system24 Sep 2026US 2026/0290683 A1Fortune Electric Co., Ltd.
- Distribution transformer system and methods thereof17 Sep 2026US 2026/0279659 A1Ubicquia, Inc.
- Ac short-circuit ice-melting control method and ice-melting distribution transformer27 Aug 2026US 2026/0254221 A1Guizhou Power Grid Company Limited
- Integral transformer junction module13 Aug 2026US 2026/0237549 A1
- Temperature compensation for current transformer metering13 Aug 2026US 2026/0237555 A1Schneider Electric USA, Inc.
Most cited
By later US patents
- Transformer fault detection47US 4,112,737 AMorgan Schaffer Ltd. · 1978
- Auto-facing unit with sensors40US 10,206,519 B1Amazon Technologies, Inc. · 2019
- Noncontact charging device with temperature detection39US 8,089,245 B2Seiko Epson Corporation · 2012
- Non-contact power system with load and gap detection36US 7,323,964 B1National Central University · 2008
- Coil with protection against overheating31US 4,112,405 A1978