B64C 27/08
With two or more rotors
Official title: with two or more rotors
B64C27/08 (With two or more rotors) appears on 607 US grants and 713 published applications in this corpus.
Search patents in B64C- Granted patents
- 607
- Published applications
- 713
- Assignees
- 171
- Inventors
- 914
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 6 |
| 2003 | 1 | 2 |
| 2004 | 2 | 4 |
| 2005 | 1 | 8 |
| 2006 | 5 | 12 |
| 2007 | 8 | 8 |
| 2008 | 2 | 9 |
| 2009 | 10 | 21 |
| 2010 | 15 | 14 |
| 2011 | 9 | 9 |
| 2012 | 6 | 8 |
| 2013 | 9 | 12 |
| 2014 | 10 | 11 |
| 2015 | 14 | 25 |
| 2016 | 14 | 34 |
| 2017 | 23 | 74 |
| 2018 | 24 | 54 |
| 2019 | 46 | 51 |
| 2020 | 68 | 71 |
| 2021 | 48 | 46 |
| 2022 | 43 | 62 |
| 2023 | 63 | 60 |
| 2024 | 62 | 56 |
| 2025 | 56 | 37 |
| 2026 | 30 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Active crew seat vibration control6 Oct 2026US 12,753,823 B2Lockheed Martin Corporation
- Decoupled hand controls for aircraft with vertical takeoff and landing and forward flight capabilities15 Sep 2026US 12,735,172 B2Kitty Hawk Corporation
- Distributed propulsion system for vertical take off and landing closed wing aircraft8 Sep 2026US 12,728,983 B2Textron Innovations Inc.
- Multicopter with self-adjusting rotors8 Sep 2026US 12,730,452 B2Kitty Hawk Corporation
- Vertical takeoff and landing (VTOL) aircraft systems and methods18 Aug 2026US 12,709,385 B2
- Decoupled hand controls for aircraft with vertical takeoff and landing and forward flight capabilities8 Oct 2026US 2026/0307783 A1Kitty Hawk Corporation
- System, assemblies and methods for mechanical-thrust power conversion multifans1 Oct 2026US 2026/0296640 A1N.M.B. Medical Applications Ltd
- Compound helicopter with lateral booms17 Sep 2026US 2026/0274404 A1Airbus Helicopters Deutschland GmbH
- Method for controlling electric flight vehicle17 Sep 2026US 2026/0274461 A1Mitsubishi Heavy Industries, Ltd.
- Flexible battery system for a vehicle20 Aug 2026US 2026/0241807 A1Kitty Hawk Corporation
Most cited
By later US patents
- Modular flying vehicle133US 8,453,962 B22013
- Modular and morphable air vehicle125US 9,045,226 B2Piasecki Aircraft Corporation · 2015
- Flying multi-purpose aircraft carrier and method of V/STOL assisted flight91US 5,000,398 A1991
- Ducted fan VTOL vehicles87US 7,857,253 B2Urban Aeronautics Ltd. · 2010
- Rotor for a dual mode aircraft86US 8,376,264 B12013