B64C 11/48
Units of two or more coaxial propellers
B64C11/48 (Units of two or more coaxial propellers) appears on 304 US grants and 348 published applications in this corpus.
Search patents in B64C- Granted patents
- 304
- Published applications
- 348
- Assignees
- 122
- Inventors
- 519
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 7 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 4 |
| 2002 | 4 | 8 |
| 2003 | 9 | 4 |
| 2004 | 3 | 6 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 17 |
| 2011 | 2 | 15 |
| 2012 | 6 | 21 |
| 2013 | 9 | 10 |
| 2014 | 19 | 7 |
| 2015 | 11 | 9 |
| 2016 | 6 | 10 |
| 2017 | 13 | 23 |
| 2018 | 11 | 17 |
| 2019 | 21 | 19 |
| 2020 | 26 | 25 |
| 2021 | 24 | 30 |
| 2022 | 31 | 28 |
| 2023 | 21 | 19 |
| 2024 | 26 | 21 |
| 2025 | 20 | 14 |
| 2026 | 16 | 37 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aircraft with an unducted fan propulsor22 Sep 2026US 12,741,747 B2General Electric Company
- Rotor assembly8 Sep 2026US 12,728,984 B2Vertical Aerospace Group Limited
- Helix tilt device for tilting coaxial propulsion system25 Aug 2026US 12,715,626 B2Lockheed Martin Corporation
- Aircraft with an unducted fan propulsor18 Aug 2026US 12,709,398 B2General Electric Company
- System, assemblies and methods for mechanical-thrust power conversion multifans23 Jun 2026US 12,662,242 B2N.M.B. Medical Applications Ltd
- Aircraft with an unducted fan propulsor8 Oct 2026US 2026/0307811 A1General Electric Company
- System, assemblies and methods for mechanical-thrust power conversion multifans1 Oct 2026US 2026/0296640 A1N.M.B. Medical Applications Ltd
- Aircraft with an unducted fan propulsor1 Oct 2026US 2026/0296653 A1General Electric Company
- Unducted Propulsion System24 Sep 2026US 2026/0285476 A1General Electric Company
- Aircraft with an unducted fan propulsor24 Sep 2026US 2026/0285489 A1General Electric Company
Most cited
By later US patents
- Unducted, counterrotating gearless front fan engine107US 4,976,102 AGeneral Electric Company · 1990
- 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
- Gas turbine engine85US 4,809,498 AGeneral Electric Company · 1989
- Counter rotation power turbine80US 5,079,916 AGeneral Electric Company · 1992