Geared turbofan engine gearbox arrangement
US-9500126-B2 · Nov 22, 2016 · US
Mechanical Engineering
Mechanical Engineering · 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 | F04D29/321 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 985 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 46 |
| 2016 | 167 |
| 2017 | 140 |
| 2018 | 126 |
| 2019 | 148 |
| 2020 | 124 |
| 2021 | 68 |
| 2022 | 51 |
| 2023 | 42 |
| 2024 | 38 |
| 2025 | 32 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotor Disk Having a Centripetal Air Collection Device, Compressor Comprising Said Disc and Turbomachine with Such a Compressor
US-2016333796-A1 · Nov 17, 2016 · US
Supply of air to an air-conditioning circuit of an aircraft cabin from its turboprop engine
US-2016332736-A1 · Nov 17, 2016 · US
Washing nozzles and gas turbine engines
US-2016305277-A1 · Oct 20, 2016 · US
Additive manufacturing shroud support structure
US-2016243620-A1 · Aug 25, 2016 · US
Gas turbine engines with internally stretched tie shafts
US-2016230560-A1 · Aug 11, 2016 · US
Reservoir egress fluid coupler
US-2016215786-A1 · Jul 28, 2016 · US
Fiber Reinforced Spacer for a Gas Turbine Engine
US-2016153463-A1 · Jun 2, 2016 · US
Bleed valve resonator drain
US-2016153311-A1 · Jun 2, 2016 · US
Compressor end-wall treatment with multiple flow axes
US-2016153360-A1 · Jun 2, 2016 · US
Panels of a fan of a gas turbine
US-2016069355-A1 · Mar 10, 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
Vortex reducer
US-9228495-B2 · Jan 5, 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
Rotor and gas turbine engine including same
US-2015369047-A1 · Dec 24, 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
Double snapped cover plate for rotor disk
US-2015369061-A1 · Dec 24, 2015 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/321?
- CPC F04D29/321 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F04D29/321 (Mechanical Engineering)?
- Our database includes 985 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/321 growing?
- Publication counts under this code: 38 in 2024 vs 32 in 2025 (latest complete years).