B64C 27/00
Rotorcraft
Official title: Rotorcraft; Rotors peculiar thereto
B64C27/00 (Rotorcraft) appears on 6,729 US grants and 6,327 published applications in this corpus.
Search patents in B64C- Granted patents
- 6,729
- Published applications
- 6,327
- Assignees
- 1,194
- Inventors
- 8,011
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 41 | 0 |
| 1977 | 39 | 0 |
| 1978 | 42 | 0 |
| 1979 | 29 | 0 |
| 1980 | 47 | 0 |
| 1981 | 57 | 0 |
| 1982 | 40 | 0 |
| 1983 | 37 | 0 |
| 1984 | 42 | 0 |
| 1985 | 55 | 0 |
| 1986 | 48 | 0 |
| 1987 | 55 | 0 |
| 1988 | 47 | 0 |
| 1989 | 44 | 0 |
| 1990 | 40 | 0 |
| 1991 | 38 | 0 |
| 1992 | 50 | 0 |
| 1993 | 62 | 0 |
| 1994 | 50 | 0 |
| 1995 | 46 | 0 |
| 1996 | 36 | 0 |
| 1997 | 35 | 0 |
| 1998 | 54 | 0 |
| 1999 | 50 | 0 |
| 2000 | 73 | 0 |
| 2001 | 70 | 16 |
| 2002 | 82 | 67 |
| 2003 | 51 | 55 |
| 2004 | 61 | 76 |
| 2005 | 50 | 87 |
| 2006 | 60 | 95 |
| 2007 | 55 | 82 |
| 2008 | 45 | 90 |
| 2009 | 60 | 130 |
| 2010 | 86 | 156 |
| 2011 | 108 | 121 |
| 2012 | 106 | 168 |
| 2013 | 124 | 215 |
| 2014 | 193 | 246 |
| 2015 | 248 | 284 |
| 2016 | 245 | 308 |
| 2017 | 267 | 461 |
| 2018 | 328 | 501 |
| 2019 | 446 | 531 |
| 2020 | 515 | 556 |
| 2021 | 449 | 469 |
| 2022 | 435 | 430 |
| 2023 | 486 | 355 |
| 2024 | 414 | 377 |
| 2025 | 389 | 260 |
| 2026 | 199 | 191 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B64C 27/04Helicopters2,326
- B64C 27/32Rotors2,067
- B64C 27/54Mechanisms for controlling blade adjustment or movement relative to rotor head1,521
- B64C 27/22Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane869
- B64C 27/82Rotorcraft: characterised by the provision of an auxiliary rotor or fluid-jet device701
- B64C 27/001Vibration damping devices638
- B64C 27/006Safety devices371
- B64C 27/52Tilting of rotor bodily relative to fuselage356
Recent patents
- Method of stabilizing articulated rotor blade6 Oct 2026US 12,752,914 B2Lockheed Martin Corporation
- Active crew seat vibration control6 Oct 2026US 12,753,823 B2Lockheed Martin Corporation
- Automated and user assisted autorotation for air vehicle6 Oct 2026US 12,754,570 B2Skyryse, Inc.
- Aerial vehicle with differential control mechanisms29 Sep 2026US 12,747,021 B2Joby Aero, Inc.
- Cable routing through rotatable-wing aircraft spars29 Sep 2026US 12,747,033 B2Toyota Jidosha Kabushiki Kaisha
- Decoupled hand controls for aircraft with vertical takeoff and landing and forward flight capabilities8 Oct 2026US 2026/0307783 A1Kitty Hawk Corporation
- Led tail rotor safety and status indication lighting system8 Oct 2026US 2026/0307785 A1Textron Innovations Inc.
- System and method of rotor management8 Oct 2026US 2026/0307786 A1Beta Air, LLC
- Systems and Methods for Manufacturing Composite Laminate Structures8 Oct 2026US 2026/0307787 A1
- V/stol aircraft8 Oct 2026US 2026/0307788 A1XTI Aircraft Company
Most cited
By later US patents
- High-efficiency, large stroke electromechanical actuator1,075US 5,907,211 AMassachusetts Institute of Technology · 1999
- Hybrid aircraft245US 5,823,468 A1998
- Multibit-per-cell non-volatile memory with error detection and correction219US 5,909,449 AInvox Technology · 1999
- Personal hoverplane with four tiltmotors216US 6,655,631 B22003
- Soft actuators and artificial muscles184US 6,109,852 AUniversity of New Mexico · 2000