B64C 11/50
Phase synchronisation between multiple propellers
B64C11/50 (Phase synchronisation between multiple propellers) appears on 64 US grants and 55 published applications in this corpus.
Search patents in B64C- Granted patents
- 64
- Published applications
- 55
- Assignees
- 35
- Inventors
- 122
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 6 |
| 2018 | 5 | 6 |
| 2019 | 5 | 3 |
| 2020 | 8 | 9 |
| 2021 | 0 | 1 |
| 2022 | 2 | 8 |
| 2023 | 3 | 3 |
| 2024 | 5 | 7 |
| 2025 | 6 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotor assembly8 Sep 2026US 12,728,984 B2Vertical Aerospace Group Limited
- Tandem tiltrotor aircraft24 Feb 2026US 12,559,231 B2Textron Innovations Inc.
- System and method for efficiently determining a phase shift in a propulsion system12 Aug 2025US 12,384,523 B2General Electric Company
- Method of reducing noise of aircraft having hybrid power plants12 Aug 2025US 12,384,552 B2Pratt & Whitney Canada Corp.
- Apparatus and methods for aircraft propeller control22 Jul 2025US 12,365,443 B2Pratt & Whitney Canada Corp.
- Aircraft propulsion system with selectively rotatable open propulsor rotor16 Apr 2026US 2026/0104011 A1Rtx Corporation
- Method of reducing noise of aircraft having hybrid power plants30 Oct 2025US 2025/0333182 A1Pratt & Whitney Canada Corp.
- Systems and methods for propulsor parking28 Aug 2025US 2025/0269973 A1Beta Air, LLC
- System and method for synchrophasing a propulsion system using electric machines26 Jun 2025US 2025/0207536 A1General Electric Company
- Method to decrease acoustic signature of a hybrid electric propulsion system26 Dec 2024US 2024/0425190 A1Raytheon Technologies Corporation
Most cited
By later US patents
- Aircraft cabin noise control apparatus50US 4,947,356 AThe Secretary of State for Trade and Industry in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland · 1990
- Vertical take-off and landing vehicle with increased cruise efficiency50US 9,475,579 B2The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2016
- Method for reducing noise and/or vibration from multiple rotating machines44US 5,789,678 AGeneral Electric Company · 1998
- Aeroengine42US 8,382,430 B2ROLLS-ROYCE plc · 2013
- Adaptive synchrophaser for reducing aircraft cabin noise and vibration40US 5,453,943 AUnited Technologies Corporation · 1995