System, assemblies and methods for mechanical-thrust power conversion multifans
US-2024158073-A1 · May 16, 2024 · US
Shrouded propellers
Shrouded propellers · 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 | B64C11/001 |
| Official title | {Shrouded propellers} |
| Display label | Shrouded propellers |
| Total patents | 497 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 15 |
| 2017 | 9 |
| 2018 | 24 |
| 2019 | 24 |
| 2020 | 71 |
| 2021 | 81 |
| 2022 | 112 |
| 2023 | 62 |
| 2024 | 55 |
| 2025 | 34 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for controlling a transition of a vertical take-off and landing aircraft from hover flight to cruise flight and vice versa
US-2024076037-A1 · Mar 7, 2024 · US
Ducts with airflow channels
US-10407167-B1 · Sep 10, 2019 · US
Rotor systems and methods
US-10343787-B2 · Jul 9, 2019 · US
Rotor support device, rotor, gas turbine engine, and aircraft
US-2019193842-A1 · Jun 27, 2019 · US
Segmented Duct for Tilting Proprotors
US-2019144107-A1 · May 16, 2019 · US
Unducted thrust producing system
US-2019136710-A1 · May 9, 2019 · US
A multirotor aircraft with an airframe and at least one wing
US-2019112039-A1 · Apr 18, 2019 · US
Aircraft
US-2018370640-A1 · Dec 27, 2018 · US
Circumferentially-driven propulsion mechanism
US-10160541-B1 · Dec 25, 2018 · US
Aerial vehicle
US-2018354613-A1 · Dec 13, 2018 · US
Vertical take-off and landing aircraft
US-2018354614-A1 · Dec 13, 2018 · US
Active Flow Control For Ducted Fans And Fan-In-Wing Configurations
US-2018346108-A1 · Dec 6, 2018 · US
Fan module with variable pitch blades
US-2018335046-A1 · Nov 22, 2018 · US
Thrust producing unit with at least two rotor assemblies and a shrouding
US-2018244367-A1 · Aug 30, 2018 · US
Thrust-Ring and Rotor Fan System
US-2018231016-A1 · Aug 16, 2018 · US
Thrust producing unit with at least two rotor assemblies and a shrouding
US-2018208295-A1 · Jul 26, 2018 · US
Vertical Takeoff and Landing (VTOL) Aircraft
US-2018208305-A1 · Jul 26, 2018 · US
Thrust producing unit with at least two rotor assemblies and a shrouding
US-2018208296-A1 · Jul 26, 2018 · US
Aerial vehicle capable of vertical take-off and landing, vertical and horizontal flight and on-air energy generation
US-2018178910-A1 · Jun 28, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C11/001?
- CPC B64C11/001 is the Cooperative Patent Classification code for “Shrouded propellers.”
- How many patents are filed under CPC B64C11/001 (Shrouded propellers)?
- Our database includes 497 publications tagged with this CPC code.
- Is patent activity under CPC B64C11/001 growing?
- Publication counts under this code: 55 in 2024 vs 34 in 2025 (latest complete years).