B64C 27/78
In association with pitch adjustment of blades of anti-torque rotor
Official title: in association with pitch adjustment of blades of anti-torque rotor
B64C27/78 (In association with pitch adjustment of blades of anti-torque rotor) appears on 87 US grants and 101 published applications in this corpus.
Search patents in B64C- Granted patents
- 87
- Published applications
- 101
- Assignees
- 29
- Inventors
- 184
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 2 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 4 |
| 2016 | 3 | 2 |
| 2017 | 2 | 34 |
| 2018 | 1 | 7 |
| 2019 | 11 | 5 |
| 2020 | 14 | 8 |
| 2021 | 15 | 16 |
| 2022 | 10 | 7 |
| 2023 | 11 | 3 |
| 2024 | 3 | 5 |
| 2025 | 4 | 1 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tail rotor bearing condition monitoring21 Apr 2026US 12,606,299 B2Microtecnica S.R.L.
- Helicopter pitch controls17 Mar 2026US 12,576,964 B1Lockheed Martin Corporation
- Variable blade pitch systems and methods27 Jan 2026US 12,534,196 B2FLIR Unmanned Aerial Systems ULC
- Electric VTOL aircraft with tilting propellers and lifting propellers9 Dec 2025US 12,491,993 B2Georgia Tech Research Corporation
- Anti-torque rotor for a helicopter30 Sep 2025US 12,428,144 B2Leonardo S.P.A.
- Vertical take-off and landing aircraft3 Sep 2026US 2026/0257806 A1
- Propulsor drive shaft with branched portion23 Jul 2026US 2026/0208859 A1Beta Air, LLC
- Control device for varying the angle of attack of the blades of an antitorque rotor for an aircraft capable of hovering11 Jun 2026US 2026/0159233 A1Leonardo S.P.A.
- Variable blade pitch systems and methods9 Jan 2025US 2025/0010984 A1FLIR Unmanned Aerial Systems ULC
- Anti-torque rotor for a helicopter15 Aug 2024US 2024/0270380 A1Leonardo S.P.A.
Most cited
By later US patents
- Tail rotor authority control for a helicopter29US 5,607,122 ABell Helicopter Textron Inc. · 1997
- Full authority fly-by-wire pedal system17US 7,874,526 B2Sikorsky Aircraft Corporation · 2011
- Low observable aircraft having a unitary lift fan16US 11,072,423 B1Textron Innovations Inc. · 2021
- Ducted tail rotor providing torque reaction and yaw attitude control16US 5,415,525 AThe Boeing Company · 1995
- Contra-rotating electric helicopter13US 11,840,329 B1SiFly Aviation, Inc. · 2023