Uav with distributed propulsion and blown control surfaces
US-2024109657-A1 · Apr 4, 2024 · US
Collapsible or foldable blades
Collapsible or foldable 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 | B64C11/28 |
| Official title | Collapsible or foldable blades |
| Display label | Collapsible or foldable blades |
| Total patents | 429 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 9 |
| 2017 | 14 |
| 2018 | 51 |
| 2019 | 67 |
| 2020 | 72 |
| 2021 | 50 |
| 2022 | 45 |
| 2023 | 51 |
| 2024 | 34 |
| 2025 | 28 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Convertible propeller
US-2018362155-A1 · Dec 20, 2018 · US
Retractable and deployable flight rotor system
US-2018362154-A1 · Dec 20, 2018 · US
Collapsible flying device
US-10106252-B1 · Oct 23, 2018 · US
Transportation Services for Pod Assemblies
US-2018281943-A1 · Oct 4, 2018 · US
Storage models for tiltrotor aircraft
US-10086936-B2 · Oct 2, 2018 · US
Storage modes for tiltrotor aircraft
US-10077106-B2 · Sep 18, 2018 · US
Self-folding propeller
US-2018257769-A1 · Sep 13, 2018 · US
Dual-mode vehicle with wheel rotors
US-2018257447-A1 · Sep 13, 2018 · US
Bimodal propeller aircraft
US-2018251215-A1 · Sep 6, 2018 · US
Storage modes for tiltrotor aircraft
US-10065736-B2 · Sep 4, 2018 · US
Distributed propulsion system for vertical take off and landing closed wing aircraft
US-2018244376-A1 · Aug 30, 2018 · US
Modular fuselage sections for vertical take off and landing distributed airframe aircraft
US-2018244364-A1 · Aug 30, 2018 · US
Foldable rotor blade assembly
US-2018229830-A1 · Aug 16, 2018 · US
Variable in-flight wing fold system
US-2018222577-A1 · Aug 9, 2018 · US
Distributed propulsion system
US-2018215462-A1 · Aug 2, 2018 · US
Forward folding rotor blades
US-2018186445-A1 · Jul 5, 2018 · US
Passenger pod assembly transportation system
US-10011351-B2 · Jul 3, 2018 · US
Tiltwing multicopter with foldable and non-foldable propellers
US-9975631-B1 · May 22, 2018 · US
Aircraft with selectively attachable passenger pod assembly
US-9963228-B2 · May 8, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B64C11/28?
- CPC B64C11/28 is the Cooperative Patent Classification code for “Collapsible or foldable blades.”
- How many patents are filed under CPC B64C11/28 (Collapsible or foldable blades)?
- Our database includes 429 publications tagged with this CPC code.
- Is patent activity under CPC B64C11/28 growing?
- Publication counts under this code: 34 in 2024 vs 28 in 2025 (latest complete years).