H01F 27/085
Cooling by ambient air
Official title: {Cooling by ambient air}
H01F27/085 (Cooling by ambient air) appears on 220 US grants and 286 published applications in this corpus.
Search patents in H01F- Granted patents
- 220
- Published applications
- 286
- Assignees
- 176
- Inventors
- 628
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 2 | 3 |
| 2005 | 1 | 7 |
| 2006 | 6 | 5 |
| 2007 | 4 | 4 |
| 2008 | 3 | 3 |
| 2009 | 4 | 5 |
| 2010 | 3 | 8 |
| 2011 | 7 | 6 |
| 2012 | 5 | 4 |
| 2013 | 7 | 8 |
| 2014 | 4 | 8 |
| 2015 | 7 | 18 |
| 2016 | 11 | 15 |
| 2017 | 8 | 16 |
| 2018 | 12 | 16 |
| 2019 | 6 | 19 |
| 2020 | 22 | 24 |
| 2021 | 12 | 33 |
| 2022 | 16 | 24 |
| 2023 | 20 | 19 |
| 2024 | 21 | 19 |
| 2025 | 12 | 11 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods for thermal management in inductors8 Sep 2026US 12,731,721 B2Hamilton Sundstrand Corporation
- Inductor and electronic device28 Jul 2026US 12,695,020 B2Huawei Digital Power Technologies Co., Ltd.
- Transformer device5 May 2026US 12,620,524 B2Dmg Mori Co., Ltd.
- Parallel transformer temperature measurement and fault detection system and method for DDC enclosures24 Feb 2026US 12,562,554 B2Carrier Corporation
- Shunt reactor with auxiliary power13 Jan 2026US 12,525,382 B2Hitachi Energy Ltd
- Fan mounting assembly and power device20 Aug 2026US 2026/0245783 A1Sungrow Power Supply Co., Ltd.
- Cooling arrangement and method for cooling at least one oil-to-air external heat exchanger6 Aug 2026US 2026/0227131 A1Hitachi Energy Ltd
- Common mode filter circuit with cooler30 Jul 2026US 2026/0221329 A1IHI Corporation
- Stationary induction charging device, and inductive vehicle charging system comprising same23 Jul 2026US 2026/0208608 A1Mahle International GmbH
- Helmet-type magnetic stimulation device16 Jul 2026US 2026/0199698 A1Remed Brainstim Co., Ltd.
Most cited
By later US patents
- Heat exchanger for cooling electrical power apparatus57US 4,266,602 AWestinghouse Electric Corp. · 1981
- Inductor transformer cooling apparatus48US 4,956,626 ASundstrand Corporation · 1990
- Respiratory system heater unit36US 8,253,076 B2Smiths Medical ASD, Inc. · 2012
- Integrated cooling duct for resin-encapsulated distribution transformer coils24US 7,023,312 B1ABB Technology AG · 2006
- Compact dry transformer20US 7,369,024 B2Crompton Greaves Limited · 2008