Flexible sleeve for adjustable fan duct nozzle
US-2021404416-A1 · Dec 30, 2021 · US
for attenuating noise
for attenuating noise · 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 | F02K1/34 |
| Official title | for attenuating noise |
| Display label | for attenuating noise |
| Total patents | 74 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 14 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 12 |
| 2020 | 6 |
| 2021 | 11 |
| 2022 | 6 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air inlet arrangement and method of making the same
US-11208969-B2 · Dec 28, 2021 · US
Thermal management system using shape memory alloy actuator
US-11168584-B2 · Nov 9, 2021 · US
Reconfigurable exhaust nozzle for a gas turbine engine
US-2021301760-A1 · Sep 30, 2021 · US
Sound-attenuating heat exchangers and methods of utilizing the same
US-11060480-B2 · Jul 13, 2021 · US
Supersonic aircraft turbofan
US-11053886-B2 · Jul 6, 2021 · US
Acoustic cavity tailored synthetic jet
US-11002221-B2 · May 11, 2021 · US
Heating system for convergent-divergent secondary nozzle
US-10995702-B2 · May 4, 2021 · US
Gas Turbine Combuster
US-2021116127-A1 · Apr 22, 2021 · US
Propulsion system for an aircraft, a nozzle for use with the propulsion system, and a method of manufacturing a propulsion system for an aircraft
US-10982623-B2 · Apr 20, 2021 · US
Thermal management systems
US-2020408107-A1 · Dec 31, 2020 · US
Active device for attenuating acoustic emissions for a turbojet engine including controlled turbines
US-2020400076-A1 · Dec 24, 2020 · US
Heating system for convergent-divergent secondary nozzle
US-2020378339-A9 · Dec 3, 2020 · US
Propulsion system for an aircraft, a nozzle for use with the propulsion system, and a method of manufacturing a propulsion system for an aircraft
US-2020088132-A1 · Mar 19, 2020 · US
Supersonic aircraft turbofan
US-2020025108-A1 · Jan 23, 2020 · US
Gas turbine engine ejector
US-2020025132-A1 · Jan 23, 2020 · US
Actively controlled cooling air exhaust door on an aircraft engine nacelle
US-10487690-B2 · Nov 26, 2019 · US
Flexible sleeve for adjustable fan duct nozzle
US-2019293020-A1 · Sep 26, 2019 · US
Device with gratings for ejecting microjets in order to reduce the jet noise of a turbine engine
US-10408165-B2 · Sep 10, 2019 · US
Directionally targeted jet noise reduction system and method
US-2019264636-A1 · Aug 29, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02K1/34?
- CPC F02K1/34 is the Cooperative Patent Classification code for “for attenuating noise.”
- How many patents are filed under CPC F02K1/34 (for attenuating noise)?
- Our database includes 74 publications tagged with this CPC code.
- Is patent activity under CPC F02K1/34 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).