B64C 27/50
Blades foldable to facilitate stowage of aircraft
B64C27/50 (Blades foldable to facilitate stowage of aircraft) appears on 239 US grants and 227 published applications in this corpus.
Search patents in B64C- Granted patents
- 239
- Published applications
- 227
- Assignees
- 92
- Inventors
- 370
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 3 |
| 2003 | 0 | 0 |
| 2004 | 4 | 5 |
| 2005 | 1 | 1 |
| 2006 | 1 | 5 |
| 2007 | 1 | 3 |
| 2008 | 0 | 1 |
| 2009 | 6 | 1 |
| 2010 | 4 | 3 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 1 | 5 |
| 2014 | 3 | 2 |
| 2015 | 3 | 7 |
| 2016 | 6 | 12 |
| 2017 | 8 | 13 |
| 2018 | 10 | 28 |
| 2019 | 23 | 28 |
| 2020 | 43 | 30 |
| 2021 | 14 | 16 |
| 2022 | 17 | 11 |
| 2023 | 15 | 17 |
| 2024 | 16 | 12 |
| 2025 | 15 | 12 |
| 2026 | 10 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Tilt-rotor wing fold mechanism and method64US 4,691,878 AThe United States of America as represented by the Secretary of the Navy · 1987
- Rotor blade stowing system64US 5,868,351 ABell Helicopter Textron Inc. · 1999
- Apparatus and method for folding and locking rotor blades61US 5,031,858 ABell Helicopter Textron Inc. · 1991
- Folding of rotorcraft rotor blades53US 9,156,545 B1Bell Helicopter Textron Inc. · 2015
- Aircraft propulsion assembly51US 10,315,761 B2Bell Helicopter Textron Inc. · 2019