Method for producing a vane comprising a reinforced cavity
US-12502852-B2 · Dec 23, 2025 · US
Hollow blades
Hollow 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 | B64C11/24 |
| Official title | Hollow blades |
| Display label | Hollow blades |
| Total patents | 52 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 5 |
| 2020 | 8 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 8 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for manufacturing a vane comprising a reinforced cavity
US-12485631-B2 · Dec 2, 2025 · US
Composite airfoil assembly having a composite airfoil and spar
US-12448892-B2 · Oct 21, 2025 · US
Composite airfoil assembly having a composite airfoil and spar
US-2025257660-A1 · Aug 14, 2025 · US
Open rotor aircraft propulsion system with anti-icing system
US-2025197013-A1 · Jun 19, 2025 · US
Open rotor nose cone ram air heat exchanger with exhaust of cooling air through static structure
US-2025154901-A1 · May 15, 2025 · US
Hollow structure and propeller blade
US-2025010974-A1 · Jan 9, 2025 · US
Rotor blade with a system for retention and for take-up of separate stresses and rotor provided with such blades
US-12116106-B2 · Oct 15, 2024 · US
Method for manufacturing a vane comprising a reinforced cavity
US-2024326358-A1 · Oct 3, 2024 · US
Method for producing a vane comprising a reinforced cavity
US-2024326359-A1 · Oct 3, 2024 · US
Unducted fan having variable pitch blades comprising reduced disturbance platforms
US-12091156-B2 · Sep 17, 2024 · US
Ice protection for electrically powered rotors
US-12012213-B2 · Jun 18, 2024 · US
Rotor blade non-counterbored retention assembly via a sliding clamped bushing
US-11999472-B2 · Jun 4, 2024 · US
Common spar assembly for use in nonfoldable and foldable proprotor blades
US-11919620-B2 · Mar 5, 2024 · US
Rotating airfoil assembly with opening formed therein to eject or to draw air
US-11858615-B2 · Jan 2, 2024 · US
Unducted fan having variable pitch blades comprising reduced disturbance platforms
US-2023348042-A1 · Nov 2, 2023 · US
Rotating airfoil assembly with opening formed therein to eject or to draw air
US-2023219681-A1 · Jul 13, 2023 · US
Aircraft propeller and aircraft
US-11679863-B2 · Jun 20, 2023 · US
Ice protection for electrically powered rotors
US-2023174241-A1 · Jun 8, 2023 · US
Composite fan blades with integral attachment mechanism
US-11644046-B2 · May 9, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C11/24?
- CPC B64C11/24 is the Cooperative Patent Classification code for “Hollow blades.”
- How many patents are filed under CPC B64C11/24 (Hollow blades)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC B64C11/24 growing?
- Publication counts under this code: 8 in 2024 vs 7 in 2025 (latest complete years).