H02K 1/22
Rotating parts of the magnetic circuit
H02K1/22 (Rotating parts of the magnetic circuit) appears on 9,206 US grants and 11,386 published applications in this corpus.
Search patents in H02K- Granted patents
- 9,206
- Published applications
- 11,386
- Assignees
- 2,515
- Inventors
- 16,113
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 11 | 0 |
| 1978 | 21 | 0 |
| 1979 | 11 | 0 |
| 1980 | 18 | 0 |
| 1981 | 25 | 0 |
| 1982 | 24 | 0 |
| 1983 | 15 | 0 |
| 1984 | 28 | 0 |
| 1985 | 17 | 0 |
| 1986 | 38 | 0 |
| 1987 | 41 | 0 |
| 1988 | 25 | 0 |
| 1989 | 42 | 0 |
| 1990 | 44 | 0 |
| 1991 | 37 | 0 |
| 1992 | 46 | 0 |
| 1993 | 39 | 0 |
| 1994 | 37 | 0 |
| 1995 | 39 | 0 |
| 1996 | 52 | 0 |
| 1997 | 47 | 0 |
| 1998 | 98 | 0 |
| 1999 | 102 | 0 |
| 2000 | 109 | 0 |
| 2001 | 92 | 32 |
| 2002 | 108 | 140 |
| 2003 | 82 | 146 |
| 2004 | 151 | 177 |
| 2005 | 143 | 164 |
| 2006 | 135 | 189 |
| 2007 | 90 | 228 |
| 2008 | 110 | 218 |
| 2009 | 129 | 245 |
| 2010 | 204 | 307 |
| 2011 | 233 | 274 |
| 2012 | 173 | 318 |
| 2013 | 194 | 431 |
| 2014 | 246 | 463 |
| 2015 | 267 | 503 |
| 2016 | 281 | 538 |
| 2017 | 392 | 647 |
| 2018 | 440 | 712 |
| 2019 | 671 | 786 |
| 2020 | 703 | 781 |
| 2021 | 628 | 697 |
| 2022 | 617 | 818 |
| 2023 | 530 | 691 |
| 2024 | 643 | 769 |
| 2025 | 568 | 594 |
| 2026 | 399 | 518 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H02K 1/27Rotor cores with permanent magnets6,660
- H02K 1/28Means for mounting or fastening rotating magnetic parts on to, or to2,009
- H02K 1/32With channels or ducts for flow of cooling medium1,232
- H02K 1/24Rotor cores with salient poles1,204
- H02K 1/26Rotor cores with slots for windings353
- H02K 1/223Rotor cores with windings and permanent magnets129
Recent patents
- Magnetization method and magnetization apparatus6 Oct 2026US 12,755,884 B2Toyota Jidosha Kabushiki Kaisha
- Crystalline radical polymerizable composition for fixing a magnet of a rotating electric machine rotor core, a rotating electric machine rotor core using the composition, and a method of manufacturing the rotating electric machine rotor core6 Oct 2026US 12,756,246 B2Aisin Corporation
- Motor rotor structure and motor6 Oct 2026US 12,756,249 B2Splash Pool & Spa, Inc.
- Rotor for a permanent magnet electric machine6 Oct 2026US 12,756,250 B2GM Global Technology Operations LLC
- Rotor apparatus for an electric machine6 Oct 2026US 12,756,251 B2Jaguar Land Rover Limited
- Pod drive8 Oct 2026US 2026/0307770 A1Hd Hyundai Electric Co., Ltd.
- Rare earth sintered magnet, method for producing rare earth sintered magnet, rotor, and rotary machine8 Oct 2026US 2026/0311916 A1Mitsubishi Electric Corporation
- Rotary electric machine8 Oct 2026US 2026/0312442 A1Denso Corporation
- Rotor for a synchronous machine8 Oct 2026US 2026/0312444 A1
- Rotor core, rotor, and electric motor8 Oct 2026US 2026/0312445 A1Fanuc Corporation
Most cited
By later US patents
- Methods and apparatus for increasing power of permanent magnet motors1,432US 6,777,838 B22004
- Electric machine having an integrally continuous stator winding and stator slot bridges1,193US 6,936,948 B2Pratt & Whitney Canada Corp. · 2005
- Architecture for electric machine1,149US 7,583,063 B2Pratt & Whitney Canada Corp. · 2009
- Blood pump having a magnetically suspended rotor250US 6,447,266 B2The United States of America as represented by the United States National Aeronautics and Space Administration · 2002
- Magnetically suspended miniature fluid pump and method of designing the same240US 6,015,272 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2000