H02K 55/04
With rotating field windings
Official title: with rotating field windings
H02K55/04 (With rotating field windings) appears on 431 US grants and 303 published applications in this corpus.
Search patents in H02K- Granted patents
- 431
- Published applications
- 303
- Assignees
- 123
- Inventors
- 580
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 17 | 0 |
| 1978 | 14 | 0 |
| 1979 | 12 | 0 |
| 1980 | 18 | 0 |
| 1981 | 25 | 0 |
| 1982 | 19 | 0 |
| 1983 | 9 | 0 |
| 1984 | 15 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 8 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 10 | 23 |
| 2003 | 18 | 16 |
| 2004 | 26 | 21 |
| 2005 | 10 | 15 |
| 2006 | 13 | 7 |
| 2007 | 8 | 9 |
| 2008 | 8 | 14 |
| 2009 | 8 | 13 |
| 2010 | 12 | 18 |
| 2011 | 10 | 11 |
| 2012 | 12 | 16 |
| 2013 | 5 | 15 |
| 2014 | 11 | 16 |
| 2015 | 11 | 10 |
| 2016 | 11 | 7 |
| 2017 | 11 | 7 |
| 2018 | 5 | 8 |
| 2019 | 7 | 6 |
| 2020 | 8 | 13 |
| 2021 | 8 | 13 |
| 2022 | 12 | 6 |
| 2023 | 2 | 6 |
| 2024 | 5 | 14 |
| 2025 | 10 | 12 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Wireless power supply system for superconducting offshore wind turbine3 Mar 2026US 12,565,875 B2Hunan University
- Superconducting motor with reduced coil stress20 Jan 2026US 12,531,457 B2Hinetics LLC
- Low-loss superconducting motor and design method thereof17 Sep 2026US 2026/0280401 A1Hunan University
- Superconducting motors and components thereof20 Aug 2026US 2026/0246355 A1Electric Mayhem, LLC
- Rotating machine25 Jun 2026US 2026/0180416 A1Changwon National University Industry Academy Cooperation Corps
- Superconducting magnet, a superconducting rotary machine having the same, and a method for manufacturing a superconducting magnet9 Apr 2026US 2026/0100630 A1Hyundai Motor Company
- Superconducting Motor with Rotating Multilayer Insulation12 Mar 2026US 2026/0074599 A1Hinetics LLC
Most cited
By later US patents
- Support structure for dynamoelectric machine stators spiral pancake winding101US 4,292,558 AWestinghouse Electric Corp. · 1981
- Concentric tilted double-helix dipoles and higher-order multipole magnets73US 6,921,042 B12005
- Air-gap winding stator construction for dynamoelectric machine68US 4,330,726 AGeneral Electric Company · 1982
- .DELTA.-Connected, two-layer, three-phase winding for an electrical machine57US 4,200,817 ABBC Brown, Boveri & Company, Limited · 1980
- Superconducting synchronous motor construction57US 5,777,420 AAmerican Superconductor Corporation · 1998