System, assemblies and methods for mechanical-thrust power conversion multifans
US-2024158073-A1 · May 16, 2024 · US
Rotorcraft characterised by having shrouded rotors, e.g. flying platforms
Rotorcraft characterised by having shrouded rotors, e.g. flying platforms · 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 | B64C27/20 |
| Official title | Rotorcraft characterised by having shrouded rotors, e.g. flying platforms |
| Display label | Rotorcraft characterised by having shrouded rotors, e.g. flying platforms |
| Total patents | 376 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 5 |
| 2017 | 12 |
| 2018 | 28 |
| 2019 | 39 |
| 2020 | 65 |
| 2021 | 60 |
| 2022 | 56 |
| 2023 | 50 |
| 2024 | 31 |
| 2025 | 24 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Six degree of freedom aerial vehicle with a ring wing
US-10518880-B2 · Dec 31, 2019 · US
Perimeter structure for unmanned aerial vehicle
US-10435176-B2 · Oct 8, 2019 · US
Method for vehicle data collection
US-2019306226-A1 · Oct 3, 2019 · US
Ducts with airflow channels
US-10407167-B1 · Sep 10, 2019 · US
Aircraft hand controller with decoupled throttle
US-2019233084-A1 · Aug 1, 2019 · US
Supplemental attitude with engaged and disengaged input device modes
US-2019171234-A1 · Jun 6, 2019 · US
A multirotor aircraft with an airframe and at least one wing
US-2019112039-A1 · Apr 18, 2019 · US
Coupling device for coupling modules with each other, aircraft comprising the coupling device, method for the coupling and decoupling of modules
US-2019061937-A1 · Feb 28, 2019 · US
Unmanned air vehicle
US-2019039725-A1 · Feb 7, 2019 · US
Aircraft
US-2019009877-A1 · Jan 10, 2019 · US
Circumferentially-driven propulsion mechanism
US-10160541-B1 · Dec 25, 2018 · US
Cooling an unmanned aerial vehicle
US-2018362179-A1 · Dec 20, 2018 · US
Personal air vehicle with ducted fans
US-2018362160-A1 · Dec 20, 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
Decoupled hand controls for aircraft with vertical takeoff and landing and forward flight capabilities
US-10144504-B1 · Dec 4, 2018 · US
Systems and methods for uav sensor placement
US-2018339768-A1 · Nov 29, 2018 · US
Aircraft
US-10131422-B2 · Nov 20, 2018 · US
Tilting ducted fan aircraft generating a pitch control moment
US-10106253-B2 · Oct 23, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C27/20?
- CPC B64C27/20 is the Cooperative Patent Classification code for “Rotorcraft characterised by having shrouded rotors, e.g. flying platforms.”
- How many patents are filed under CPC B64C27/20 (Rotorcraft characterised by having shrouded rotors, e.g. flying platforms)?
- Our database includes 376 publications tagged with this CPC code.
- Is patent activity under CPC B64C27/20 growing?
- Publication counts under this code: 31 in 2024 vs 24 in 2025 (latest complete years).