H02K 9/225
Heat pipes
Official title: {Heat pipes}
H02K9/225 (Heat pipes) appears on 190 US grants and 210 published applications in this corpus.
Search patents in H02K- Granted patents
- 190
- Published applications
- 210
- Assignees
- 169
- Inventors
- 577
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 1 |
| 2003 | 3 | 4 |
| 2004 | 2 | 3 |
| 2005 | 3 | 3 |
| 2006 | 4 | 7 |
| 2007 | 4 | 5 |
| 2008 | 3 | 11 |
| 2009 | 6 | 3 |
| 2010 | 6 | 9 |
| 2011 | 4 | 4 |
| 2012 | 3 | 9 |
| 2013 | 4 | 4 |
| 2014 | 2 | 10 |
| 2015 | 6 | 3 |
| 2016 | 5 | 4 |
| 2017 | 5 | 10 |
| 2018 | 4 | 11 |
| 2019 | 5 | 13 |
| 2020 | 15 | 9 |
| 2021 | 11 | 17 |
| 2022 | 7 | 11 |
| 2023 | 11 | 17 |
| 2024 | 12 | 10 |
| 2025 | 12 | 17 |
| 2026 | 12 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Motor having cooling structure16 Jun 2026US 12,658,766 B2Hyundai Motor Company
- Electric motor with integrated cooling9 Jun 2026US 12,651,943 B2Hamilton Sundstrand Corporation
- Linear actuator system with integrated transverse flux motor19 May 2026US 12,633,801 B2Tolomatic, Inc.
- Power assembly and electric vehicle12 May 2026US 12,627,202 B2Huawei Digital Power Technologies Co., Ltd.
- Winding slot-embedded vapor chambers and heat pipes with endcap heat sinks for electric machines5 May 2026US 12,620,874 B2GM Global Technology Operations LLC
- High speed electrical machine1 Oct 2026US 2026/0302870 A1Celeroton Turbocell AG
- Electric Motor10 Sep 2026US 2026/0269690 A1Innomotics GmbH
- Electric drive system20 Aug 2026US 2026/0241784 A1Shanghai Pangood Power Technology Co., Ltd
- Motor and aircraft13 Aug 2026US 2026/0238087 A1Nidec Corporation
- Fluid Cooled Heat Pipe Thermal Management System for an Electric Motor13 Aug 2026US 2026/0238088 A1Marquette University
Most cited
By later US patents
- Rotor for brushless electromotor and method for making same95US 5,369,325 ASeiko Epson Corporation · 1994
- Electrical machine with double-sided rotor83US 7,154,191 B2General Electric Company · 2006
- Turbo-generator81US 5,285,123 ADoryokuro Kakunenryo Kaihatsu Jigyodan · 1994
- Rotor for brushless electromotor70US 5,508,576 ASeiko Epson Corporation · 1996
- Heat pipes for cooling pole windings of salient pole machines62US 5,140,204 AWestinghouse Electric Corp. · 1992