B64C 27/325
Circulation-control rotors
Official title: {Circulation-control rotors}
B64C27/325 (Circulation-control rotors) appears on 30 US grants and 12 published applications in this corpus.
Search patents in B64C- Granted patents
- 30
- Published applications
- 12
- Assignees
- 15
- Inventors
- 48
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 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 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 3 |
| 2022 | 2 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power supply system and moving object23 Jun 2026US 12,665,418 B2Honda Motor Co., Ltd.
- Flying body, controller, control program, and control method29 Apr 2025US 12,286,251 B2Kabushiki Kaisha Toshiba
- Flight duration enhancement for single rotorcraft and multicopters20 Aug 2024US 12,065,237 B2Arizona Board of Regents on Behalf of the University of Arizona
- Method and system for engine windmilling control5 Sep 2023US 11,745,863 B2Pratt & Whitney Canada Corp.
- Active flow control for ducted fans and fan-in-wing configurations1 Nov 2022US 11,485,486 B2The University of Toledo
- Power supply system and moving object28 Aug 2025US 2025/0273955 A1Honda Motor Co., Ltd.
- Flying body, controller, control program, and control method1 Feb 2024US 2024/0034490 A1Kabushiki Kaisha Toshiba
- Uav with augmented lift rotors22 Jun 2023US 2023/0192290 A1Wing Aviation LLC
- Flight duration enhancement for single rotorcraft and multicopters20 Apr 2023US 2023/0122833 A1Arizona Board of Regents on Behalf of the University of Arizona
- Multi-rotor aerial vehicle and control method thereof24 Jun 2021US 2021/0188426 A1Sz Dji Technology Co., Ltd.
Most cited
By later US patents
- X-wing fly-by-wire vehicle management system52US 4,965,879 AUnited Technologies Corporation · 1990
- Higher harmonic control system for X-Wing aircraft38US 4,953,098 AUnited Technologies Corporation · 1990
- X-wing helicopter-scout attack configuration33US 4,711,415 ANorthrop Corporation · 1987
- Control law system for X-Wing aircraft25US 4,980,835 AUnited Technologies Corporation · 1990
- Pneumatic valve control for circulation control aircraft17US 4,507,050 AUnited Technologies Corporation · 1985