H02K 23/04
Having permanent magnet excitation
Official title: having permanent magnet excitation
H02K23/04 (Having permanent magnet excitation) appears on 328 US grants and 242 published applications in this corpus.
Search patents in H02K- Granted patents
- 328
- Published applications
- 242
- Assignees
- 146
- Inventors
- 586
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 13 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 12 | 0 |
| 1985 | 11 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 11 | 0 |
| 1991 | 2 | 0 |
| 1992 | 10 | 0 |
| 1993 | 7 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 2 |
| 2002 | 5 | 11 |
| 2003 | 8 | 9 |
| 2004 | 14 | 15 |
| 2005 | 10 | 19 |
| 2006 | 11 | 10 |
| 2007 | 6 | 11 |
| 2008 | 5 | 8 |
| 2009 | 3 | 9 |
| 2010 | 7 | 21 |
| 2011 | 10 | 17 |
| 2012 | 12 | 13 |
| 2013 | 6 | 11 |
| 2014 | 12 | 5 |
| 2015 | 11 | 7 |
| 2016 | 5 | 8 |
| 2017 | 4 | 11 |
| 2018 | 5 | 12 |
| 2019 | 8 | 9 |
| 2020 | 11 | 4 |
| 2021 | 4 | 10 |
| 2022 | 5 | 8 |
| 2023 | 6 | 3 |
| 2024 | 8 | 2 |
| 2025 | 2 | 6 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- DC motor with dual commutator bar set and selectable series and parallel connected coils1,444US 7,893,586 B2Black & Decker Inc. · 2011
- Compound interaction/induction electric rotating machine107US 4,441,043 A1984
- Method of making permanent magnet assembly70US 4,845,837 AEmerson Electric Co. · 1989
- Permanent magnet field structure for dynamoelectric machines63US 3,979,619 ACanadian General Electric Company Limited · 1976
- Dynamoelectric machine with inner and outer stators56US 4,114,057 A1978