Outdoor unit and air conditioner including the same
US-2018363928-A1 · Dec 20, 2018 · US
Fluid-guiding means, e.g. diffusers
Fluid-guiding means, e.g. diffusers · 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 | F04D29/54 |
| Official title | Fluid-guiding means, e.g. diffusers |
| Display label | Fluid-guiding means, e.g. diffusers |
| Total patents | 179 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 21 |
| 2017 | 14 |
| 2018 | 26 |
| 2019 | 17 |
| 2020 | 24 |
| 2021 | 12 |
| 2022 | 10 |
| 2023 | 13 |
| 2024 | 14 |
| 2025 | 12 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Composite vane
US-10138738-B2 · Nov 27, 2018 · US
Intake structure of compressor
US-2018298919-A1 · Oct 18, 2018 · US
Fan assembly
US-10094581-B2 · Oct 9, 2018 · US
Fan diffuser having a circular inlet and a rotationally asymmetrical outlet
US-10072671-B2 · Sep 11, 2018 · US
Axial flow fan
US-10012242-B2 · Jul 3, 2018 · US
Axial flow fan
US-2018180063-A1 · Jun 28, 2018 · US
Rotating fluid machine
US-9995164-B2 · Jun 12, 2018 · US
Fan assembly
US-9982677-B2 · May 29, 2018 · US
Fan and air-conditioning device
US-2018142704-A1 · May 24, 2018 · US
Cooling system for air-cooled engines
US-9945281-B2 · Apr 17, 2018 · US
Flow machine
US-9920770-B2 · Mar 20, 2018 · US
Gas Turbine Manufacturing Method
US-2018066662-A1 · Mar 8, 2018 · US
Rotor blade and axial flow rotary machine
US-2018051714-A1 · Feb 22, 2018 · US
Blower device
US-9829010-B2 · Nov 28, 2017 · US
Blower and outdoor unit of air conditioner comprising same
US-9822801-B2 · Nov 21, 2017 · US
Compressor vane or blade for engine
US-2017298945-A1 · Oct 19, 2017 · US
Blade-retaining plate with internal cut-outs for a turbomachine stator
US-9771815-B2 · Sep 26, 2017 · US
Vane retainer
US-2017268357-A1 · Sep 21, 2017 · US
Airfoil geometry of blade for axial compressor
US-9752589-B2 · Sep 5, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/54?
- CPC F04D29/54 is the Cooperative Patent Classification code for “Fluid-guiding means, e.g. diffusers.”
- How many patents are filed under CPC F04D29/54 (Fluid-guiding means, e.g. diffusers)?
- Our database includes 179 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/54 growing?
- Publication counts under this code: 14 in 2024 vs 12 in 2025 (latest complete years).