Float with flaps for air cooling in an aircraft
US-11273924-B2 · Mar 15, 2022 · US
Drive of rotors by means, e.g. propellers, mounted on rotor blades
Drive of rotors by means, e.g. propellers, mounted on rotor blades · 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 | B64C27/16 |
| Official title | Drive of rotors by means, e.g. propellers, mounted on rotor blades |
| Display label | Drive of rotors by means, e.g. propellers, mounted on rotor blades |
| Total patents | 73 |
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 | 1 |
| 2017 | 31 |
| 2018 | 4 |
| 2019 | 6 |
| 2020 | 12 |
| 2021 | 5 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Slewing mechanical power transmissions for rotorcraft
US-11203424-B2 · Dec 21, 2021 · US
Unmanned aerial vehicle
US-2021214075-A1 · Jul 15, 2021 · US
Single collective stick for a rotary wing aircraft
US-11040770-B2 · Jun 22, 2021 · US
Dual rotor, rotary wing aircraft
US-11021241-B2 · Jun 1, 2021 · US
Float with flaps for air cooling in an aircraft
US-2021155350-A1 · May 27, 2021 · US
Thrust producing unit with a fail-safe electrical drive unit
US-2020407052-A1 · Dec 31, 2020 · US
Slewing mechanical power transmissions for rotorcraft
US-2020290734-A1 · Sep 17, 2020 · US
Gearbox casing, a gearbox, and an aircraft
US-10737777-B2 · Aug 11, 2020 · US
Hub separation in dual rotor rotary wing aircraft
US-10717521-B2 · Jul 21, 2020 · US
Gearbox for a dual rotor, rotary wing aircraft
US-10676181-B2 · Jun 9, 2020 · US
Spring-loaded flaps for air cooling in a wet environment
US-10669037-B1 · Jun 2, 2020 · US
Collective to elevator mixing of a rotary wing aircraft
US-10654565-B2 · May 19, 2020 · US
Rotorcraft rotor and propeller speed
US-10640203-B2 · May 5, 2020 · US
Hybrid propulsion system for multi-rotor rotary wing aircraft, comprising improved dc/ac conversion means
US-2020115062-A1 · Apr 16, 2020 · US
Lift offset control of a rotary wing aircraft
US-10619698-B2 · Apr 14, 2020 · US
Variable speed rotor with slow rotation mode
US-2020055410-A1 · Feb 20, 2020 · US
Rotorcraft footprint
US-10527123-B2 · Jan 7, 2020 · US
Active vibration control of a rotorcraft
US-10443675-B2 · Oct 15, 2019 · US
Noise modes for rotary wing aircraft
US-10443674-B2 · Oct 15, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C27/16?
- CPC B64C27/16 is the Cooperative Patent Classification code for “Drive of rotors by means, e.g. propellers, mounted on rotor blades.”
- How many patents are filed under CPC B64C27/16 (Drive of rotors by means, e.g. propellers, mounted on rotor blades)?
- Our database includes 73 publications tagged with this CPC code.
- Is patent activity under CPC B64C27/16 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).