B64D 31/18
For hybrid-electric power plants
Official title: for hybrid-electric power plants
B64D31/18 (For hybrid-electric power plants) appears on 557 US grants and 714 published applications in this corpus.
Search patents in B64D- Granted patents
- 557
- Published applications
- 714
- Assignees
- 139
- Inventors
- 896
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 4 |
| 2010 | 0 | 7 |
| 2011 | 0 | 1 |
| 2012 | 5 | 3 |
| 2013 | 0 | 3 |
| 2014 | 4 | 13 |
| 2015 | 8 | 4 |
| 2016 | 8 | 14 |
| 2017 | 11 | 12 |
| 2018 | 11 | 48 |
| 2019 | 27 | 26 |
| 2020 | 36 | 77 |
| 2021 | 34 | 71 |
| 2022 | 45 | 90 |
| 2023 | 102 | 99 |
| 2024 | 96 | 83 |
| 2025 | 96 | 82 |
| 2026 | 71 | 75 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multicore hybrid-electric powertrain controller6 Oct 2026US 12,752,769 B2Pratt & Whitney Canada Corp.
- Anti-stall system with a fuel cell22 Sep 2026US 12,742,425 B2General Electric Company
- Aircraft propulsion system with hybrid-electric powerplant15 Sep 2026US 12,735,190 B1Rtx Corporation
- Aircraft hybrid electric propulsion and attitude controller15 Sep 2026US 12,735,191 B2Rtx Corporation
- Distributed propulsion system for vertical take off and landing closed wing aircraft8 Sep 2026US 12,728,983 B2Textron Innovations Inc.
- Hybrid propulsion system cockpit interface8 Oct 2026US 2026/0310252 A1Rolls-Royce Deutschland Ltd & Co KG
- Systems and methods for rotor assemblies and manufacturing thereof1 Oct 2026US 2026/0296634 A1Archer Aviation Inc.
- Control device, moving object, control method, and storage medium1 Oct 2026US 2026/0296662 A1Honda Motor Co., Ltd.
- Insulation fault detection device, electrical power supply system, and a method for detecting an insulation fault1 Oct 2026US 2026/0299001 A1H55 SA
- Control device and phase error correction method1 Oct 2026US 2026/0302977 A1Honda Motor Co., Ltd.
Most cited
By later US patents
- Personal hoverplane with four tiltmotors216US 6,655,631 B22003
- Aircraft propulsion system using air liquefaction and storage72US 5,106,035 AAurora Flight Sciences Corporation · 1992
- Hybrid propulsive engine including at least one independently rotatable propeller/fan58US 8,099,944 B2The Invention Science Fund I, LLC · 2012
- Aircraft using turbo-electric hybrid propulsion system57US 8,727,271 B22014
- System and method of augmenting power in a rotorcraft52US 8,939,399 B2Textron Innovations Inc. · 2015