B64U 50/20
Transmission of mechanical power to rotors or propellers
B64U50/20 (Transmission of mechanical power to rotors or propellers) appears on 164 US grants and 223 published applications in this corpus.
Search patents in B64U- Granted patents
- 164
- Published applications
- 223
- Assignees
- 130
- Inventors
- 426
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 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 | 0 | 2 |
| 2004 | 3 | 1 |
| 2005 | 0 | 3 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 7 |
| 2011 | 0 | 0 |
| 2012 | 5 | 3 |
| 2013 | 1 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 3 |
| 2016 | 1 | 6 |
| 2017 | 5 | 24 |
| 2018 | 12 | 22 |
| 2019 | 18 | 14 |
| 2020 | 20 | 19 |
| 2021 | 11 | 16 |
| 2022 | 17 | 13 |
| 2023 | 11 | 22 |
| 2024 | 16 | 22 |
| 2025 | 19 | 25 |
| 2026 | 15 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Unmanned aerial vehicle, control terminal, aircraft rescue method, and aircraft rescue system29 Sep 2026US 12,748,427 B2Sz Dji Technology Co., Ltd.
- Automated imaging of photovoltaic devices using an aerial vehicle and automated flight of the aerial vehicle for performing the same1 Sep 2026US 12,724,429 B2Quantified Energy Labs Pte. Ltd.
- Helix tilt device for tilting coaxial propulsion system25 Aug 2026US 12,715,626 B2Lockheed Martin Corporation
- Aerial vehicle14 Jul 2026US 12,679,575 B2Kubota Corporation
- Aerial vehicle30 Jun 2026US 12,668,380 B2Sz Dji Technology Co., Ltd.
- Subminiature drone comprising rotary artificial muscle motor and operating method thereof8 Oct 2026US 2026/0307830 A1Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
- Systems and methods for controlling torque for aerial vehicle24 Sep 2026US 2026/0285508 A1Sonin Hybrid, LLC
- Aircraft and aircraft control method27 Aug 2026US 2026/0249986 A1Aeronext Inc.
- Moving platform for transporting things27 Aug 2026US 2026/0250022 A1Skyworker Technologies Ltd.
- Industrial aerial robot systems and methods20 Aug 2026US 2026/0242078 A1
Most cited
By later US patents
- Rotary aircraft passively stable in hover70US 5,297,759 A1994
- Radio-controlled flying apparatus65US 5,071,383 AJal Data Communications & Systems Co., Ltd. · 1991
- Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors60US 5,351,913 AUnited Technologies Corporation · 1994
- Unmanned air vehicle and method of flying an unmanned air vehicle53US 6,742,741 B1The Boeing Company · 2004
- Aircraft53US 7,364,114 B22008