B64C 27/28
With forward-propulsion propellers pivotable to act as lifting rotors
Official title: with forward-propulsion propellers pivotable to act as lifting rotors
B64C27/28 (With forward-propulsion propellers pivotable to act as lifting rotors) appears on 259 US grants and 289 published applications in this corpus.
Search patents in B64C- Granted patents
- 259
- Published applications
- 289
- Assignees
- 87
- Inventors
- 426
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 3 |
| 2003 | 3 | 4 |
| 2004 | 3 | 2 |
| 2005 | 3 | 6 |
| 2006 | 6 | 4 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 4 |
| 2010 | 3 | 6 |
| 2011 | 3 | 1 |
| 2012 | 3 | 5 |
| 2013 | 3 | 4 |
| 2014 | 5 | 9 |
| 2015 | 12 | 7 |
| 2016 | 3 | 11 |
| 2017 | 5 | 8 |
| 2018 | 10 | 22 |
| 2019 | 19 | 36 |
| 2020 | 30 | 34 |
| 2021 | 17 | 24 |
| 2022 | 27 | 23 |
| 2023 | 23 | 24 |
| 2024 | 26 | 21 |
| 2025 | 28 | 17 |
| 2026 | 10 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Battery and engine architecture for VTOL aircraft25 Aug 2026US 12,715,578 B2Archer Aviation Inc.
- Rotor position control system11 Aug 2026US 12,703,481 B2Textron Innovations Inc.
- Vertical take-off and landing aircraft9 Jun 2026US 12,649,572 B2Archer Aviation Inc.
- Free wing multirotor transitional S/VTOL aircraft12 May 2026US 12,623,776 B2Autonomous Flight Systems Inc.
- Vertical take-off and landing aircraft14 Apr 2026US 12,600,470 B2Archer Aviation Inc.
- Battery and engine architecture for vtol aircraft13 Aug 2026US 2026/0233832 A1Archer Aviation Inc.
- Aerodynamic design of propeller blades in vtol aircraft23 Jul 2026US 2026/0208857 A1Archer Aviation Inc.
- Foldable rotary wing aircraft9 Jul 2026US 2026/0192911 A1Lockheed Martin Corporation
- Battery and engine architecture for vtol aircraft2 Jul 2026US 2026/0184424 A1Archer Aviation Inc.
- Double hinged tilting mount for coaxial contra rotating electric propulsion25 Jun 2026US 2026/0175972 A1Lockheed Martin Corporation
Most cited
By later US patents
- Hybrid aircraft245US 5,823,468 A1998
- Personal hoverplane with four tiltmotors216US 6,655,631 B22003
- Aircraft with wings and movable propellers140US 9,187,174 B22015
- Modular flying vehicle133US 8,453,962 B22013
- Aircraft with selectively attachable passenger pod assembly112US 9,963,228 B2Bell Helicopter Textron Inc. · 2018