B64C 2027/8209
Electrically driven tail rotors
Official title: {Electrically driven tail rotors}
B64C2027/8209 (Electrically driven tail rotors) appears on 86 US grants and 120 published applications in this corpus.
Search patents in B64C- Granted patents
- 86
- Published applications
- 120
- Assignees
- 27
- Inventors
- 159
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 0 | 1 |
| 2015 | 3 | 1 |
| 2016 | 2 | 3 |
| 2017 | 2 | 34 |
| 2018 | 1 | 5 |
| 2019 | 9 | 5 |
| 2020 | 10 | 21 |
| 2021 | 11 | 16 |
| 2022 | 15 | 15 |
| 2023 | 16 | 6 |
| 2024 | 11 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Parallel hybrid electric vertical takeoff and landing aircraft7 Apr 2026US 12,595,071 B1Lockheed Martin Corporation
- Hybrid power systems for different modes of flight23 Sep 2025US 12,420,921 B2Kitty Hawk Corporation
- Rotorcraft having an electric drive for driving a main and/or tail rotor of the rotorcraft3 Dec 2024US 12,157,561 B2Kopter Group AG
- Aircraft thermal management system5 Nov 2024US 12,134,481 B2Textron Innovations Inc.
- VTOL rotorcraft with annular contra-rotating rotary wings and auxiliary propulsor8 Oct 2024US 12,110,103 B2
- Compound helicopter with lateral booms17 Sep 2026US 2026/0274404 A1Airbus Helicopters Deutschland GmbH
- Hybrid propulsion helicopter including main coaxial counter-rotating rotors and auxiliary tail rotors17 Sep 2026US 2026/0274462 A1
- 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
- Rotorcraft with anti-torque air system and tail rotor(s)18 Sep 2025US 2025/0289567 A1Pratt & Whitney Canada Corp.
- Hybrid power systems for different modes of flight7 Nov 2024US 2024/0367788 A1Kitty Hawk Corporation
Most cited
By later US patents
- Marine hulls and drives97US 7,984,684 B22011
- Electric powered rotary-wing aircraft60US 8,931,732 B2Sikorsky Aircraft Corporation · 2015
- Multimotor modular electric drive powertrain system for turbine powered vehicles58US 4,554,989 A1985
- Electrical powered tail rotor of a helicopter48US 9,174,728 B2Airbus Helicopters Deutschland GmbH · 2015
- Hybrid drive and energy system for aircraft43US 9,194,285 B2Airbus Helicopters Deutschland GmbH · 2015