Inlet pre-swirl gas turbine engine
US-2018363677-A1 · Dec 20, 2018 · US
by fluid injection
by fluid injection · 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 | F04D29/684 |
| Official title | {by fluid injection} |
| Display label | by fluid injection |
| Total patents | 247 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 15 |
| 2016 | 17 |
| 2017 | 14 |
| 2018 | 22 |
| 2019 | 17 |
| 2020 | 28 |
| 2021 | 33 |
| 2022 | 42 |
| 2023 | 17 |
| 2024 | 24 |
| 2025 | 14 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Inlet pre-swirl gas turbine engine
US-2018363676-A1 · Dec 20, 2018 · US
Compressor tip injector
US-10145387-B2 · Dec 4, 2018 · US
Propeller fan
US-2018335045-A1 · Nov 22, 2018 · US
Exhaust diffuser having ejection hole and suction hole, and gas turbine having the same
US-2018313231-A1 · Nov 1, 2018 · US
Aircraft comprising a rear fairing propulsion system with inlet stator comprising a blowing function
US-2018230945-A1 · Aug 16, 2018 · US
Guide vane
US-10012103-B2 · Jul 3, 2018 · US
Return flow channel formation part for centrifugal compressor and centrifugal compressor
US-2018172025-A1 · Jun 21, 2018 · US
Vane diffuser and method for controlling a compressor having same
US-2018172022-A1 · Jun 21, 2018 · US
Compressor of a Turbocharger Having an Air Recirculation Valve and Turbocharger and Motor Vehicle Having Such a Compressor
US-2018058309-A1 · Mar 1, 2018 · US
Compressor and turbo chiller
US-9897092-B2 · Feb 20, 2018 · US
Bearing cooling flow and energy recovery systems
US-9897093-B2 · Feb 20, 2018 · US
Assembly and method for influencing flow through a fan of a gas turbine engine
US-2018030893-A1 · Feb 1, 2018 · US
Internal combustion engine with exhaust-gas turbocharging and exhaust-gas recirculation
US-9863307-B2 · Jan 9, 2018 · US
Compressor and supercharging system of internal combustion engine
US-2017370378-A1 · Dec 28, 2017 · US
Group of blade rows
US-9822645-B2 · Nov 21, 2017 · US
Centrifugal compressor diffuser and method for controlling same
US-9803652-B2 · Oct 31, 2017 · US
Environmental control system utilizing enhanced compressor
US-2017305559-A1 · Oct 26, 2017 · US
Airfoils for reducing secondary flow losses in gas turbine engines
US-2017218774-A1 · Aug 3, 2017 · US
Synthetic jets in compressors
US-9719361-B2 · Aug 1, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/684?
- CPC F04D29/684 is the Cooperative Patent Classification code for “by fluid injection.”
- How many patents are filed under CPC F04D29/684 (by fluid injection)?
- Our database includes 247 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/684 growing?
- Publication counts under this code: 24 in 2024 vs 14 in 2025 (latest complete years).