H01F 27/406
Temperature sensor or protection
Official title: {Temperature sensor or protection}
H01F27/406 (Temperature sensor or protection) appears on 141 US grants and 157 published applications in this corpus.
Search patents in H01F- Granted patents
- 141
- Published applications
- 157
- Assignees
- 115
- Inventors
- 445
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 2 |
| 2002 | 1 | 3 |
| 2003 | 3 | 2 |
| 2004 | 4 | 3 |
| 2005 | 3 | 4 |
| 2006 | 2 | 1 |
| 2007 | 2 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 4 |
| 2010 | 1 | 3 |
| 2011 | 1 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 4 |
| 2014 | 0 | 5 |
| 2015 | 4 | 8 |
| 2016 | 8 | 10 |
| 2017 | 3 | 10 |
| 2018 | 9 | 5 |
| 2019 | 8 | 20 |
| 2020 | 10 | 12 |
| 2021 | 9 | 12 |
| 2022 | 11 | 14 |
| 2023 | 15 | 8 |
| 2024 | 10 | 8 |
| 2025 | 4 | 5 |
| 2026 | 4 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power transformer16 Jun 2026US 12,658,359 B2Hitachi Energy Ltd
- Distribution transformer system and methods thereof12 May 2026US 12,626,859 B2Ubicquia, Inc.
- Parallel transformer temperature measurement and fault detection system and method for DDC enclosures24 Feb 2026US 12,562,554 B2Carrier Corporation
- Sensor for transformer condition assessment17 Feb 2026US 12,553,878 B2Aurtra Pty Ltd
- Leak detection in transformers2 Dec 2025US 12,487,143 B1Saudi Arabian Oil Company
- 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
- Temperature compensation for current transformer metering13 Aug 2026US 2026/0237555 A1Schneider Electric USA, Inc.
- High-energy scalable, pulse-power, multimode multifilar-wound inductor6 Aug 2026US 2026/0229402 A1Richard H. Sherratt and Susan B. Sherratt Trust Fund
- Thermoplastic coil spacer23 Jul 2026US 2026/0210776 A1One Power Company
Most cited
By later US patents
- Noncontact charging device with temperature detection39US 8,089,245 B2Seiko Epson Corporation · 2012
- Coil with protection against overheating31US 4,112,405 A1978
- Chip-type composite electronic component and manufacturing method thereof31US 6,525,395 B1Murata Manufacturing Co., Ltd. · 2003
- Re-locatable partial discharge transducer head28US 7,081,757 B2Siemens Aktiengesellschaft · 2006
- Method and device for prevention against explosion and fire of electrical transformers21US 5,946,171 A1999