Impeller with variable backsweep angle
US-12492707-B2 · Dec 9, 2025 · US
Flexible vanes
Flexible vanes · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F04D29/305 |
| Official title | {Flexible vanes} |
| Display label | Flexible vanes |
| Total patents | 36 |
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 | 2 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Impeller with variable backsweep angle
US-2025283478-A1 · Sep 11, 2025 · US
Secondary flow guide vane of a turbomachine and turbomachine provided therewith
US-12372001-B2 · Jul 29, 2025 · US
Fan with adjustable blade structures
US-2025146506-A1 · May 8, 2025 · US
Unducted rectifier for a turbomachine, turbomachine module and aircraft turbomachine
US-12291980-B2 · May 6, 2025 · US
Secondary flow guide vane of a turbomachine and turbomachine provided therewith
US-2025137380-A1 · May 1, 2025 · US
Unducted rectifier for a turbomachine, turbomachine module and aircraft turbomachine
US-2024271541-A1 · Aug 15, 2024 · US
Flexible guide vane structure of mixed flow pump with adjustable flow area, mixed flow pump and adjustment method
US-11988222-B2 · May 21, 2024 · US
Flexible guide vane structure of mixed flow pump with adjustable flow area, mixed flow pump and adjustment method
US-2024044339-A1 · Feb 8, 2024 · US
Fan
US-11719252-B2 · Aug 8, 2023 · US
Fan module
US-11578728-B2 · Feb 14, 2023 · US
Fan
US-2022290684-A1 · Sep 15, 2022 · US
Fan
US-11339796-B2 · May 24, 2022 · US
Heat dissipation fan
US-11268525-B2 · Mar 8, 2022 · US
Centrifugal fan assembly
US-10954955-B2 · Mar 23, 2021 · US
Flexible impeller pumps and disposable fluid flow circuits incorporating such pumps
US-10865805-B2 · Dec 15, 2020 · US
Fan module
US-2020355199-A1 · Nov 12, 2020 · US
Impeller, fan and method for manufacturing fan blade
US-10794393-B2 · Oct 6, 2020 · US
Heat dissipation fan
US-2020191157-A1 · Jun 18, 2020 · US
Blade and fan
US-2020182253-A1 · Jun 11, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/305?
- CPC F04D29/305 is the Cooperative Patent Classification code for “Flexible vanes.”
- How many patents are filed under CPC F04D29/305 (Flexible vanes)?
- Our database includes 36 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/305 growing?
- Publication counts under this code: 3 in 2024 vs 6 in 2025 (latest complete years).