F02D 31/001
Electric control of rotation speed
Official title: {Electric control of rotation speed}
F02D31/001 (Electric control of rotation speed) appears on 1,876 US grants and 1,182 published applications in this corpus.
Search patents in F02D- Granted patents
- 1,876
- Published applications
- 1,182
- Assignees
- 403
- Inventors
- 3,420
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 14 | 0 |
| 1981 | 16 | 0 |
| 1982 | 21 | 0 |
| 1983 | 40 | 0 |
| 1984 | 54 | 0 |
| 1985 | 50 | 0 |
| 1986 | 47 | 0 |
| 1987 | 43 | 0 |
| 1988 | 34 | 0 |
| 1989 | 36 | 0 |
| 1990 | 26 | 0 |
| 1991 | 36 | 0 |
| 1992 | 24 | 0 |
| 1993 | 35 | 0 |
| 1994 | 20 | 0 |
| 1995 | 19 | 0 |
| 1996 | 27 | 0 |
| 1997 | 30 | 0 |
| 1998 | 26 | 0 |
| 1999 | 34 | 0 |
| 2000 | 45 | 0 |
| 2001 | 45 | 12 |
| 2002 | 48 | 39 |
| 2003 | 46 | 52 |
| 2004 | 52 | 61 |
| 2005 | 61 | 59 |
| 2006 | 60 | 52 |
| 2007 | 64 | 48 |
| 2008 | 41 | 48 |
| 2009 | 32 | 67 |
| 2010 | 44 | 63 |
| 2011 | 31 | 39 |
| 2012 | 47 | 48 |
| 2013 | 45 | 52 |
| 2014 | 54 | 59 |
| 2015 | 52 | 66 |
| 2016 | 43 | 51 |
| 2017 | 64 | 63 |
| 2018 | 56 | 49 |
| 2019 | 59 | 52 |
| 2020 | 49 | 50 |
| 2021 | 49 | 46 |
| 2022 | 49 | 43 |
| 2023 | 43 | 24 |
| 2024 | 23 | 22 |
| 2025 | 18 | 9 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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