Method of operating a vehicle
US-12297927-B2 · May 13, 2025 · US
the pressure fluid being generated otherwise, e.g. by compressing air
the pressure fluid being generated otherwise, e.g. by compressing air · 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 | F02N9/04 |
| Official title | the pressure fluid being generated otherwise, e.g. by compressing air |
| Display label | the pressure fluid being generated otherwise, e.g. by compressing air |
| Total patents | 55 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 7 |
| 2019 | 10 |
| 2020 | 6 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Nitrogen compression system for leakage test on gas pipeline used for engine and vessel including the same
US-2024280221-A1 · Aug 22, 2024 · US
Method for starting operation of an internal combustion engine
US-11608807-B2 · Mar 21, 2023 · US
Methods and system for preparing an engine for starting
US-11603818-B1 · Mar 14, 2023 · US
Method of operating a vehicle
US-2023056276-A1 · Feb 23, 2023 · US
Method of operating a vehicle
US-11480260-B2 · Oct 25, 2022 · US
Delay circuit for providing natural gas to an engine and systems, assemblies, and methods thereof
US-11459992-B1 · Oct 4, 2022 · US
Method and system for reducing a startup time of a genset
US-11448148-B2 · Sep 20, 2022 · US
A method for starting operation of an internal combustion engine
US-2022228546-A1 · Jul 21, 2022 · US
Combined cycle plant, control device thereof, and operation method thereof
US-11274600-B2 · Mar 15, 2022 · US
Method of operating a vehicle
US-2021003229-A1 · Jan 7, 2021 · US
High altitude air start equipment for aircraft reciprocating engine
US-10883466-B2 · Jan 5, 2021 · US
Method for starting an internal combustion engine
US-10794352-B2 · Oct 6, 2020 · US
Method and system for reducing a startup time of a genset
US-2020271066-A1 · Aug 27, 2020 · US
Hybrid vehicle
US-10697418-B2 · Jun 30, 2020 · US
Combined cycle plant, control device thereof, and operation method thereof
US-2020149471-A1 · May 14, 2020 · US
Combined cycle plant, control device thereof, and steam turbine startup method
US-2020132032-A1 · Apr 30, 2020 · US
Integrated starter for aerial vehicle
US-10598095-B2 · Mar 24, 2020 · US
Engine starting via electric turbocharger
US-10487789-B2 · Nov 26, 2019 · US
Control valve and air starting system
US-2019323622-A1 · Oct 24, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02N9/04?
- CPC F02N9/04 is the Cooperative Patent Classification code for “the pressure fluid being generated otherwise, e.g. by compressing air.”
- How many patents are filed under CPC F02N9/04 (the pressure fluid being generated otherwise, e.g. by compressing air)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC F02N9/04 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).