F04D 27/004
Control: by varying driving speed
Official title: {by varying driving speed}
F04D27/004 (Control: by varying driving speed) appears on 1,078 US grants and 1,344 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,078
- Published applications
- 1,344
- Assignees
- 601
- Inventors
- 2,539
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 11 | 4 |
| 2002 | 18 | 10 |
| 2003 | 9 | 22 |
| 2004 | 18 | 24 |
| 2005 | 10 | 27 |
| 2006 | 11 | 19 |
| 2007 | 20 | 31 |
| 2008 | 14 | 24 |
| 2009 | 15 | 32 |
| 2010 | 22 | 41 |
| 2011 | 20 | 31 |
| 2012 | 41 | 54 |
| 2013 | 35 | 52 |
| 2014 | 42 | 67 |
| 2015 | 28 | 66 |
| 2016 | 30 | 78 |
| 2017 | 44 | 85 |
| 2018 | 64 | 77 |
| 2019 | 82 | 82 |
| 2020 | 84 | 88 |
| 2021 | 63 | 103 |
| 2022 | 80 | 74 |
| 2023 | 75 | 67 |
| 2024 | 76 | 57 |
| 2025 | 66 | 76 |
| 2026 | 42 | 53 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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