B64C 2220/00
Active noise reduction systems
B64C2220/00 (Active noise reduction systems) appears on 158 US grants and 167 published applications in this corpus.
Search patents in B64C- Granted patents
- 158
- Published applications
- 167
- Assignees
- 93
- Inventors
- 327
- Latest grant
- 1 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 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 3 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 2 |
| 2007 | 2 | 3 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 4 | 2 |
| 2014 | 3 | 1 |
| 2015 | 3 | 7 |
| 2016 | 6 | 8 |
| 2017 | 10 | 14 |
| 2018 | 12 | 13 |
| 2019 | 15 | 19 |
| 2020 | 12 | 14 |
| 2021 | 22 | 12 |
| 2022 | 11 | 17 |
| 2023 | 13 | 15 |
| 2024 | 12 | 11 |
| 2025 | 11 | 8 |
| 2026 | 8 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dynamic aircraft routing1 Sep 2026US 12,725,099 B2Joby Aero, Inc.
- Rotor craft noise cancellation system and method18 Aug 2026US 12,711,937 B2
- Dynamic aircraft routing11 Aug 2026US 12,705,551 B2Joby Aero, Inc.
- Multifunctional thermal and acoustic insulation system for an aircraft4 Aug 2026US 12,698,075 B2Airbus Operations GmbH
- Vertical take-off and landing (VTOL) aircraft noise signature mitigation19 May 2026US 12,632,803 B2Joby Aero, Inc.
- Aeronautical propulsion unit with improved acoustics17 Sep 2026US 2026/0274398 A1Safran Aircraft Engines
- Vertical Take-Off and Landing (VTOL) Aircraft Noise Signature Mitigation10 Sep 2026US 2026/0268241 A1Joby Aero, Inc.
- Wake Filling for Propeller Noise Reduction13 Aug 2026US 2026/0233829 A1Textron Aviation Inc.
- Method of determining an aircraft trajectory with a noise abatement procedure during takeoff following a total pseudo-slope setpoint, associated method, system and aircraft13 Aug 2026US 2026/0237304 A1Dassault Aviation
- Motor control with tunable notch filter23 Jul 2026US 2026/0208872 A1Beta Air, LLC
Most cited
By later US patents
- Unmanned aerial vehicle motor driving randomization and feedback for noise abatement102US 9,415,870 B1Amazon Technologies, Inc. · 2016
- Active airborne noise abatement82US 9,442,496 B1Amazon Technologies, Inc. · 2016
- Hybrid active-passive noise and vibration control system for aircraft77US 5,845,236 ALord Corporation · 1998
- Unmanned aerial vehicle motor driving randomization for noise abatement70US 9,422,055 B1Amazon Technologies, Inc. · 2016
- Real-time noise reduction system for dynamic motor frequencies aboard an unmanned aerial vehicle (UAV)69US 9,489,937 B1Trace Live Network Inc. · 2016