H02K 15/021
Magnetic cores
H02K15/021 (Magnetic cores) appears on 1,563 US grants and 1,847 published applications in this corpus.
Search patents in H02K- Granted patents
- 1,563
- Published applications
- 1,847
- Assignees
- 619
- Inventors
- 3,799
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 8 | 0 |
| 1978 | 15 | 0 |
| 1979 | 5 | 0 |
| 1980 | 11 | 0 |
| 1981 | 7 | 0 |
| 1982 | 15 | 0 |
| 1983 | 11 | 0 |
| 1984 | 7 | 0 |
| 1985 | 6 | 0 |
| 1986 | 10 | 0 |
| 1987 | 10 | 0 |
| 1988 | 7 | 0 |
| 1989 | 14 | 0 |
| 1990 | 7 | 0 |
| 1991 | 6 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 12 | 0 |
| 1995 | 10 | 0 |
| 1996 | 10 | 0 |
| 1997 | 19 | 0 |
| 1998 | 21 | 0 |
| 1999 | 29 | 0 |
| 2000 | 19 | 0 |
| 2001 | 24 | 17 |
| 2002 | 26 | 33 |
| 2003 | 25 | 31 |
| 2004 | 24 | 43 |
| 2005 | 27 | 35 |
| 2006 | 35 | 34 |
| 2007 | 26 | 30 |
| 2008 | 16 | 42 |
| 2009 | 17 | 39 |
| 2010 | 37 | 28 |
| 2011 | 37 | 45 |
| 2012 | 38 | 60 |
| 2013 | 33 | 74 |
| 2014 | 39 | 92 |
| 2015 | 47 | 79 |
| 2016 | 49 | 63 |
| 2017 | 65 | 72 |
| 2018 | 55 | 110 |
| 2019 | 79 | 144 |
| 2020 | 111 | 117 |
| 2021 | 107 | 112 |
| 2022 | 101 | 110 |
| 2023 | 64 | 86 |
| 2024 | 74 | 117 |
| 2025 | 71 | 114 |
| 2026 | 51 | 120 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Manufacturing apparatus of laminated iron core6 Oct 2026US 12,756,280 B2Nippon Steel Corporation
- Stator body for an electric motor, stator, electric motor, and associated manufacturing method22 Sep 2026US 12,744,417 B2Valeo Systemes D/Essuyage
- Systems and methods for direct winding heat exchanger in motor15 Sep 2026US 12,738,788 B2BorgWarner US Technologies LLC
- Electric motor, kitchen machine and assembly method15 Sep 2026US 12,738,818 B2Vorwerk & Co. Interholding GmbH
- Synchronous reluctance motor having a stator with stacked laminations and a method of construction8 Sep 2026US 12,732,048 B2GHSP, Inc.
- Laminated core, rotor, and manufacturing method of laminated core8 Oct 2026US 2026/0312446 A1Nippon Steel Corporation
- Motor, and method for manufacturing motor8 Oct 2026US 2026/0312449 A1Delta Electronics, Inc.
- Stator mask for electron beam welding8 Oct 2026US 2026/0312471 A1Ford Global Technologies, LLC
- Method for manufacturing laminated iron core8 Oct 2026US 2026/0312474 A1Mitsui High-Tec, Inc.
- Electric Machine, Electric Axle Drive, Motor Vehicle, And Method For Manufacturing An Electric Machine8 Oct 2026US 2026/0312475 A1ZF Friedrichshafen AG
Most cited
By later US patents
- Method for manufacturing long, slender lamina stack from nonuniform laminae118US 6,163,949 AL. H. Carbide Corporation · 2000
- Method of manufacturing cores for rotary electric machines97US 6,226,856 B1Matsushita Electric Industrial Co., Ltd. · 2001
- Rotary motor and production method thereof, and laminated core and production method thereof91US 5,859,486 AMitsubishi Denki Kabushiki Kaisha · 1999
- Dynamo electric machines89US 4,797,602 ALucas Industries public limited company · 1989
- Stator for dynamoelectric machine82US 5,986,377 AKabushiki Kaisha Toshiba · 1999