Aircraft and methods of operating the same to increase descent angles thereof
US-2024059409-A1 · Feb 22, 2024 · US
with provision for reducing drag of inoperative rotor
with provision for reducing drag of inoperative rotor · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B64C27/30 |
| Official title | with provision for reducing drag of inoperative rotor |
| Display label | with provision for reducing drag of inoperative rotor |
| Total patents | 263 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 6 |
| 2017 | 11 |
| 2018 | 21 |
| 2019 | 32 |
| 2020 | 30 |
| 2021 | 37 |
| 2022 | 29 |
| 2023 | 38 |
| 2024 | 30 |
| 2025 | 21 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Articulated Electric Propulsion System With Fully Stowing Blades And Lightweight Vertical Take-Off And Landing Aircraft Using Same
US-2019375500-A1 · Dec 12, 2019 · US
Magnetic orientation detent with motor assist
US-10479496-B2 · Nov 19, 2019 · US
Vertical takeoff and landing aircraft
US-2019337614-A1 · Nov 7, 2019 · US
Clip-on propeller mount
US-2019329866-A1 · Oct 31, 2019 · US
Passively folding propeller blades for drag reduction
US-2019329877-A1 · Oct 31, 2019 · US
Torque Path Coupling Assemblies for Tiltrotor Aircraft
US-2019276142-A1 · Sep 12, 2019 · US
Tiltwing multicopter with foldable and non-foldable propellers
US-10336448-B2 · Jul 2, 2019 · US
Folding proprotor gimbal lock and blade lock mechanism
US-10336447-B2 · Jul 2, 2019 · US
Folding spindle and bearing assembly in a folding rotor blade assembly
US-2019185142-A1 · Jun 20, 2019 · US
Transportation services for pod assemblies
US-10322799-B2 · Jun 18, 2019 · US
Dual Rotor Propulsion Systems for Tiltrotor Aircraft
US-2019176980-A1 · Jun 13, 2019 · US
Articulated electric propulsion system with fully stowing blades and lightweight vertical take-off and landing aircraft using same
US-10315760-B2 · Jun 11, 2019 · US
Extended Range Quad Tiltrotor Aircraft
US-2019144109-A1 · May 16, 2019 · US
Propeller Units
US-2019071171-A1 · Mar 7, 2019 · US
Gimbal Lock Hook Systems for Rotorcraft
US-2019047692-A1 · Feb 14, 2019 · US
Clutch with Synchronizer and Locking Mechanism
US-2019023410-A1 · Jan 24, 2019 · US
Retractable and deployable flight rotor system
US-2018362154-A1 · Dec 20, 2018 · US
Tethered wind turbine using a stopped rotor aircraft
US-10144510-B1 · Dec 4, 2018 · US
Propeller units
US-10137982-B1 · Nov 27, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C27/30?
- CPC B64C27/30 is the Cooperative Patent Classification code for “with provision for reducing drag of inoperative rotor.”
- How many patents are filed under CPC B64C27/30 (with provision for reducing drag of inoperative rotor)?
- Our database includes 263 publications tagged with this CPC code.
- Is patent activity under CPC B64C27/30 growing?
- Publication counts under this code: 30 in 2024 vs 21 in 2025 (latest complete years).