Ventilation device and vehicle with a ventilation device
US-9850914-B2 · Dec 26, 2017 · US
having a special shape in order to influence fluid flow
having a special shape in order to influence fluid flow · 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 | F04D29/547 |
| Official title | {having a special shape in order to influence fluid flow} |
| Display label | having a special shape in order to influence fluid flow |
| Total patents | 284 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 22 |
| 2017 | 26 |
| 2018 | 29 |
| 2019 | 40 |
| 2020 | 32 |
| 2021 | 31 |
| 2022 | 21 |
| 2023 | 26 |
| 2024 | 24 |
| 2025 | 18 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air injection for an axial compressor with radially outer annulus
US-2017363107-A1 · Dec 21, 2017 · US
Stator of an axial compressor stage of a turbomachine
US-9822795-B2 · Nov 21, 2017 · US
Blower and outdoor unit of air conditioner comprising same
US-9822801-B2 · Nov 21, 2017 · US
Nacelle short inlet
US-2017298954-A1 · Oct 19, 2017 · US
Thrust generating apparatus for controlling attitude of movable body
US-2017276139-A1 · Sep 28, 2017 · US
Multistage axial flow compressor
US-9759230-B2 · Sep 12, 2017 · US
Fan Systems
US-2017204875-A1 · Jul 20, 2017 · US
Controlled convergence compressor flowpath for a gas turbine engine
US-2017204878-A1 · Jul 20, 2017 · US
Systems and methods for a compressor diffusion slot
US-2017191484-A1 · Jul 6, 2017 · US
Circulator
US-9683579-B2 · Jun 20, 2017 · US
Variable-Geometry Ducted Fan
US-2017159674-A1 · Jun 8, 2017 · US
Axial fan
US-2017152854-A1 · Jun 1, 2017 · US
Axial flow fan motor
US-9664196-B2 · May 30, 2017 · US
Compressor casing comprising cavities having an optimised upstream shape
US-9638213-B2 · May 2, 2017 · US
Compressor
US-2017108006-A1 · Apr 20, 2017 · US
Air management system for the outdoor unit of a residential air conditioner or heat pump
US-2017102007-A1 · Apr 13, 2017 · US
Fan systems
US-9618010-B2 · Apr 11, 2017 · US
Air purifier and blower device thereof
US-2017089595-A1 · Mar 30, 2017 · US
Multi-passage diffuser with reactivated boundary layer
US-9574575-B2 · Feb 21, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/547?
- CPC F04D29/547 is the Cooperative Patent Classification code for “having a special shape in order to influence fluid flow.”
- How many patents are filed under CPC F04D29/547 (having a special shape in order to influence fluid flow)?
- Our database includes 284 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/547 growing?
- Publication counts under this code: 24 in 2024 vs 18 in 2025 (latest complete years).