B64C 2027/8254
Shrouded tail rotors
Official title: {Shrouded tail rotors, e.g. "Fenestron" fans}
B64C2027/8254 (Shrouded tail rotors) appears on 132 US grants and 114 published applications in this corpus.
Search patents in B64C- Granted patents
- 132
- Published applications
- 114
- Assignees
- 41
- Inventors
- 220
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 4 |
| 2010 | 2 | 2 |
| 2011 | 2 | 0 |
| 2012 | 2 | 6 |
| 2013 | 2 | 5 |
| 2014 | 3 | 5 |
| 2015 | 7 | 7 |
| 2016 | 7 | 4 |
| 2017 | 3 | 2 |
| 2018 | 3 | 6 |
| 2019 | 5 | 8 |
| 2020 | 8 | 19 |
| 2021 | 8 | 7 |
| 2022 | 13 | 17 |
| 2023 | 15 | 6 |
| 2024 | 7 | 6 |
| 2025 | 7 | 2 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotorcraft with a tail boom and an integral stabilizer arrangement9 Jun 2026US 12,649,571 B2Airbus Helicopters Deutschland GmbH
- Rotorcraft with a tail boom having a duct-type portion7 Apr 2026US 12,595,050 B2Airbus Helicopters Deutschland GmbH
- Electric tiltrotor aircraft27 Jan 2026US 12,534,197 B2Textron Innovations Inc.
- Protective shroud for aircraft tail rotor18 Nov 2025US 12,473,086 B2Textron Innovations Inc.
- Aircraft23 Sep 2025US 12,420,942 B2Honda Motor Co., Ltd.
- Compound helicopter with lateral booms17 Sep 2026US 2026/0274404 A1Airbus Helicopters Deutschland GmbH
- Method for controlling at least one rotor of a flight vehicle, control data provision unit for a flight vehicle and a flight vehicle having at least one rotor18 Jun 2026US 2026/0167320 A1Kopter Germany GmbH
- Rotary-Wing Aircraft Provided with at least one Multi-Plane Pitch Stabilizer30 Apr 2026US 2026/0116526 A1Airbus Helicopters
- Rotorcraft with anti-torque air system and tail rotor(s)18 Sep 2025US 2025/0289567 A1Pratt & Whitney Canada Corp.
- Electric tiltrotor aircraft29 May 2025US 2025/0171139 A1Textron Innovations Inc.
Most cited
By later US patents
- Variable-pitch multi-blade propeller incorporating individually dismountable blades made of composite materials, process for manufacturing such blades and blades thus produced63US 4,626,172 ASociete Nationale Industrielle Aerospatiale · 1986
- Electrical powered tail rotor of a helicopter48US 9,174,728 B2Airbus Helicopters Deutschland GmbH · 2015
- Variable-pitch multi-blade propeller incorporating individually dismountable blades made of composite materials, process for manufacturing such blades and blades thus produced42US 4,626,173 ASociete Nationale Industrielle et Aerospatiale · 1986
- Self-driving helicopter tail rotor41US 4,953,811 AThe United States of America as represented by the Secretary of the Army · 1990
- Helicopter antitorque device35US 5,131,604 AUnited Technologies Corporation · 1992