B64C 27/33
Having flexing arms
Official title: having flexing arms
B64C27/33 (Having flexing arms) appears on 241 US grants and 156 published applications in this corpus.
Search patents in B64C- Granted patents
- 241
- Published applications
- 156
- Assignees
- 53
- Inventors
- 335
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 8 | 0 |
| 1981 | 11 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 9 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 1 |
| 2004 | 4 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 6 |
| 2007 | 5 | 2 |
| 2008 | 1 | 2 |
| 2009 | 1 | 1 |
| 2010 | 3 | 6 |
| 2011 | 2 | 5 |
| 2012 | 3 | 5 |
| 2013 | 3 | 10 |
| 2014 | 7 | 10 |
| 2015 | 8 | 11 |
| 2016 | 8 | 7 |
| 2017 | 8 | 42 |
| 2018 | 13 | 9 |
| 2019 | 18 | 13 |
| 2020 | 18 | 5 |
| 2021 | 10 | 3 |
| 2022 | 4 | 6 |
| 2023 | 4 | 4 |
| 2024 | 3 | 2 |
| 2025 | 3 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Teetering rotor yoke with pitched arms18 Nov 2025US 12,473,084 B1Textron Innovations Inc.
- Mast dampener for a rotorcraft2 Sep 2025US 12,404,018 B2Jaunt Air Mobility, LLC
- Drone arms locking/deployment mechanism4 Feb 2025US 12,214,871 B2Spear U.A.V Ltd
- Tension torsion strap of a rotor head of a rotary wing aircraft10 Dec 2024US 12,162,595 B2Kopter Group AG
- Rotor centrifugal force retention device25 Jun 2024US 12,017,761 B2Textron Innovations Inc.
- Compact propeller blade retention assembly23 Apr 2026US 2026/0109458 A1Lockheed Martin Corporation
- Aerial vehicle11 Jul 2024US 2024/0228072 A9Aeronext Inc.
- Aerial vehicle25 Apr 2024US 2024/0132235 A1Aeronext Inc.
- Compact propeller blade retention assembly10 Aug 2023US 2023/0249811 A1Lockheed Martin Corporation
- Rotor assembly22 Jun 2023US 2023/0192280 A1Lockheed Martin Corporation
Most cited
By later US patents
- Optimum speed tilt rotor67US 6,641,365 B22003
- Soft inplane bearingless helicopter rotor66US 4,427,340 ABell Helicopter Textron Inc. · 1984
- Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors60US 5,351,913 AUnited Technologies Corporation · 1994
- Matched stiffness rotor flexbeam and blade system59US 4,332,525 AUnited Technologies Corporation · 1982
- Laminated composite rotor yoke49US 4,293,276 ATextron Inc. · 1981