B64C 27/54
Mechanisms for controlling blade adjustment or movement relative to rotor head
Official title: Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
B64C27/54 (Mechanisms for controlling blade adjustment or movement relative to rotor head) appears on 1,521 US grants and 1,425 published applications in this corpus.
Search patents in B64C- Granted patents
- 1,521
- Published applications
- 1,425
- Assignees
- 342
- Inventors
- 2,032
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 8 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 14 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 11 | 0 |
| 1994 | 10 | 0 |
| 1995 | 12 | 0 |
| 1996 | 4 | 0 |
| 1997 | 9 | 0 |
| 1998 | 14 | 0 |
| 1999 | 6 | 0 |
| 2000 | 19 | 0 |
| 2001 | 16 | 2 |
| 2002 | 17 | 14 |
| 2003 | 12 | 8 |
| 2004 | 12 | 10 |
| 2005 | 6 | 21 |
| 2006 | 16 | 18 |
| 2007 | 10 | 18 |
| 2008 | 9 | 24 |
| 2009 | 11 | 24 |
| 2010 | 25 | 26 |
| 2011 | 21 | 27 |
| 2012 | 24 | 34 |
| 2013 | 22 | 62 |
| 2014 | 48 | 66 |
| 2015 | 86 | 78 |
| 2016 | 71 | 73 |
| 2017 | 70 | 125 |
| 2018 | 69 | 121 |
| 2019 | 117 | 128 |
| 2020 | 130 | 97 |
| 2021 | 102 | 100 |
| 2022 | 84 | 86 |
| 2023 | 114 | 73 |
| 2024 | 79 | 93 |
| 2025 | 103 | 55 |
| 2026 | 46 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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