B64D 2027/005
Aircraft with an unducted turbofan comprising contra-rotating rotors
Official title: {Aircraft with an unducted turbofan comprising contra-rotating rotors, e.g. contra-rotating open rotors [CROR]}
B64D2027/005 (Aircraft with an unducted turbofan comprising contra-rotating rotors) appears on 281 US grants and 330 published applications in this corpus.
Search patents in B64D- Granted patents
- 281
- Published applications
- 330
- Assignees
- 52
- Inventors
- 445
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 7 | 0 |
| 1989 | 0 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 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 | 3 |
| 2009 | 0 | 3 |
| 2010 | 1 | 6 |
| 2011 | 2 | 21 |
| 2012 | 10 | 26 |
| 2013 | 12 | 23 |
| 2014 | 24 | 29 |
| 2015 | 18 | 24 |
| 2016 | 22 | 20 |
| 2017 | 29 | 23 |
| 2018 | 18 | 11 |
| 2019 | 19 | 12 |
| 2020 | 20 | 9 |
| 2021 | 9 | 9 |
| 2022 | 8 | 6 |
| 2023 | 14 | 19 |
| 2024 | 18 | 17 |
| 2025 | 18 | 15 |
| 2026 | 10 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Aircraft with symmetric propulsion system rotating patterns23 Jun 2026US 12,662,250 B2Rtx Corporation
- Control system for open rotor propulsion system with one or more sensors9 Jun 2026US 12,650,085 B1Rtx Corporation
- Tractor aircraft power plant with swirl recovery vanes2 Jun 2026US 12,644,407 B2Pratt & Whitney Canada Corp.
- Aircraft with symmetric propulsion system rotating patterns8 Oct 2026US 2026/0307812 A1Rtx Corporation
- Gas turbine engine13 Aug 2026US 2026/0235038 A1General Electric Company
- Cross debris protection for open rotor propulsion system(s)6 Aug 2026US 2026/0225721 A1Rtx Corporation
- Angled pylon structure for open rotor propulsion system6 Aug 2026US 2026/0225723 A1Rtx Corporation
- Asynchronous airfoil pitch adjustment for aircraft propulsion system6 Aug 2026US 2026/0226837 A1Rtx Corporation
Most cited
By later US patents
- Unducted, counterrotating gearless front fan engine107US 4,976,102 AGeneral Electric Company · 1990
- Aircraft gas turbine engine sideways mount106US 5,443,229 AGeneral Electric Company · 1995
- Pitch change mechanism100US 5,174,716 AGeneral Electric Company · 1992
- Noise reduction in aircraft propellers100US 5,190,441 AGeneral Electric Company · 1993
- Ultra-efficient propulsor with an augmentor fan circumscribing a turbofan98US 8,689,538 B2The Boeing Company · 2014