Geared turbofan engine gearbox arrangement
US-9500126-B2 · Nov 22, 2016 · US
for axial flow fans (blade mountings F04D29/34, blades F04D29/38)
for axial flow fans (blade mountings F04D29/34, blades F04D29/38) · 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 | F04D29/325 |
| Official title | {for axial flow fans (blade mountings F04D29/34, blades F04D29/38)} |
| Display label | for axial flow fans (blade mountings F04D29/34, blades F04D29/38) |
| Total patents | 1,395 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 48 |
| 2016 | 152 |
| 2017 | 211 |
| 2018 | 185 |
| 2019 | 165 |
| 2020 | 180 |
| 2021 | 128 |
| 2022 | 104 |
| 2023 | 77 |
| 2024 | 73 |
| 2025 | 63 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fan assembly and air conditioner having the same
US-2016298636-A1 · Oct 13, 2016 · US
Portable Working Machine
US-2016298551-A1 · Oct 13, 2016 · US
Method of attaching a ceramic matrix composite article
US-2016281515-A1 · Sep 29, 2016 · US
Air guiding device and method for operating the same
US-2016251041-A1 · Sep 1, 2016 · US
Reversible fan module
US-9433124-B2 · Aug 30, 2016 · US
Axial ventilation device, premises equipped with such a device
US-2016245293-A1 · Aug 25, 2016 · US
Fan blade assembly
US-2016230774-A1 · Aug 11, 2016 · US
Efficient, low pressure ratio propulsor for gas turbine engines
US-2016201607-A1 · Jul 14, 2016 · US
Gas turbine engine forward bearing compartment architecture
US-2016160674-A1 · Jun 9, 2016 · US
Flexible support structure for a geared architecture gas turbine engine
US-2016053635-A1 · Feb 25, 2016 · US
Compact aero-thermo model based control system
US-2016003165-A1 · Jan 7, 2016 · US
Compact Aero-Thermo Model Based Tip Clearance Management
US-2015378364-A1 · Dec 31, 2015 · US
Compact Aero-Thermo Model Based Engine Power Control
US-2015378334-A1 · Dec 31, 2015 · US
Large diameter fan having low profile radial air gap motor
US-2015377241-A1 · Dec 31, 2015 · US
Low Speed Fan for Gas Turbine Engines
US-2015369046-A1 · Dec 24, 2015 · US
Compact Aero-Thermo Model Base Point Linear System Based State Estimator
US-2015370233-A1 · Dec 24, 2015 · US
Motor fan
US-2015369257-A1 · Dec 24, 2015 · US
Compact Aero-Thermo Model Real Time Linearization Based State Estimator
US-2015369136-A1 · Dec 24, 2015 · US
Gas turbine engine airfoil
US-2015354367-A1 · Dec 10, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/325?
- CPC F04D29/325 is the Cooperative Patent Classification code for “for axial flow fans (blade mountings F04D29/34, blades F04D29/38).”
- How many patents are filed under CPC F04D29/325 (for axial flow fans (blade mountings F04D29/34, blades F04D29/38))?
- Our database includes 1,395 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/325 growing?
- Publication counts under this code: 73 in 2024 vs 63 in 2025 (latest complete years).