B64U 50/11
Using internal combustion piston engines
Official title: using internal combustion piston engines
B64U50/11 (Using internal combustion piston engines) appears on 328 US grants and 412 published applications in this corpus.
Search patents in B64U- Granted patents
- 328
- Published applications
- 412
- Assignees
- 186
- Inventors
- 706
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 2 |
| 2003 | 5 | 11 |
| 2004 | 3 | 6 |
| 2005 | 9 | 11 |
| 2006 | 14 | 14 |
| 2007 | 7 | 9 |
| 2008 | 3 | 5 |
| 2009 | 3 | 5 |
| 2010 | 9 | 12 |
| 2011 | 2 | 5 |
| 2012 | 7 | 4 |
| 2013 | 3 | 5 |
| 2014 | 2 | 7 |
| 2015 | 4 | 5 |
| 2016 | 7 | 15 |
| 2017 | 17 | 26 |
| 2018 | 18 | 45 |
| 2019 | 29 | 34 |
| 2020 | 28 | 39 |
| 2021 | 22 | 34 |
| 2022 | 22 | 33 |
| 2023 | 32 | 28 |
| 2024 | 25 | 21 |
| 2025 | 26 | 30 |
| 2026 | 10 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Distributed propulsion system for vertical take off and landing closed wing aircraft8 Sep 2026US 12,728,983 B2Textron Innovations Inc.
- Hybrid drive and fuel vaporizer for UAV and other mobile environments18 Aug 2026US 12,709,419 B2LiquidPiston, Inc.
- Modular power plant for a rotorcraft and associated rotorcraft11 Aug 2026US 12,703,500 B2Airbus Helicopters
- Hybrid electric drive systems for unmanned aircraft systems14 Jul 2026US 12,679,574 B2Dragoon Technology LLC
- Systems and methods for controlling torque for aerial vehicle24 Sep 2026US 2026/0285508 A1Sonin Hybrid, LLC
- Hybrid propulsion helicopter including main coaxial counter-rotating rotors and auxiliary tail rotors17 Sep 2026US 2026/0274462 A1
- Gutter cleaning system and method27 Aug 2026US 2026/0250957 A1Pangu Tech LLC
- Unmanned Aerial Vehicle Inspection System2 Apr 2026US 2026/0091869 A1Skydio, Inc.
- Powertrain for aerial vehicle19 Mar 2026US 2026/0077885 A1Sonin Hybrid, LLC
Most cited
By later US patents
- Unmanned aerial vehicle apparatus, system and method for retrieving data228US 6,868,314 B12005
- Horizontal and vertical take off and landing unmanned aerial vehicle222US 5,890,441 A1999
- On-board redundant power system for unmanned aerial vehicles142US 9,376,208 B1Amazon Technologies, Inc. · 2016
- Unmanned craft126US 4,410,151 AVereinigte Flugtechnische Werke-Fokker GmbH · 1983
- Modular and morphable air vehicle125US 9,045,226 B2Piasecki Aircraft Corporation · 2015