H02K 21/227
Having an annular armature coil
Official title: {having an annular armature coil}
H02K21/227 (Having an annular armature coil) appears on 130 US grants and 123 published applications in this corpus.
Search patents in H02K- Granted patents
- 130
- Published applications
- 123
- Assignees
- 88
- Inventors
- 269
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 7 |
| 2003 | 3 | 4 |
| 2004 | 8 | 5 |
| 2005 | 2 | 3 |
| 2006 | 4 | 4 |
| 2007 | 1 | 5 |
| 2008 | 7 | 6 |
| 2009 | 3 | 7 |
| 2010 | 7 | 5 |
| 2011 | 5 | 10 |
| 2012 | 6 | 2 |
| 2013 | 4 | 4 |
| 2014 | 2 | 3 |
| 2015 | 3 | 4 |
| 2016 | 2 | 1 |
| 2017 | 2 | 5 |
| 2018 | 0 | 10 |
| 2019 | 5 | 3 |
| 2020 | 5 | 1 |
| 2021 | 4 | 5 |
| 2022 | 7 | 5 |
| 2023 | 5 | 7 |
| 2024 | 1 | 7 |
| 2025 | 8 | 7 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Rotating electric machine65US 4,280,072 AMatsushita Electric Industrial Co., Ltd. · 1981
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