Valve system for two-stroke engine
US-2025354528-A1 · Nov 20, 2025 · 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 | F02B25/02 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 51 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 6 |
| 2017 | 3 |
| 2018 | 9 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 5 |
| 2024 | 4 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for in-cylinder engine pressure sensor cooling
US-12359605-B1 · Jul 15, 2025 · US
Internal combustion engine system
US-2025067207-A1 · Feb 27, 2025 · US
Internal combustion engine system
US-2025067226-A1 · Feb 27, 2025 · US
Two-stroke engine
US-12098669-B2 · Sep 24, 2024 · US
System device for stratified injecting exhaust gas recirculation for clean combustion of internal combustion engine
US-12012912-B2 · Jun 18, 2024 · US
Spark ignition internal combustion engine
US-11879378-B2 · Jan 23, 2024 · US
Ammonia-hydrogen fusion fuel diffusion combustion control system based on reactivity regulation
US-2024018915-A1 · Jan 18, 2024 · US
Schnuerle scavenging two-stroke engine
US-11828221-B2 · Nov 28, 2023 · US
Two-stroke engine
US-2023265781-A1 · Aug 24, 2023 · US
Schnuerle scavenging two-stroke engine
US-2023193811-A1 · Jun 22, 2023 · US
System device for stratified injecting exhaust gas recirculation for clean combustion of internal combustion engine
US-2023193859-A1 · Jun 22, 2023 · US
Spark ignition internal combustion engine
US-2023047309-A1 · Feb 16, 2023 · US
Mixture formation unit and two stroke engine having a mixture formation unit
US-11384715-B2 · Jul 12, 2022 · US
Engine
US-11199140-B2 · Dec 14, 2021 · US
Cylinder cooling in opposed-piston engines
US-11156184-B2 · Oct 26, 2021 · US
Cylinder cooling in opposed-piston engines
US-2021115873-A1 · Apr 22, 2021 · US
Mixture formation unit and two stroke engine having a mixture formation unit
US-2020386192-A1 · Dec 10, 2020 · US
Internal combustion engine and method for its operation
US-10858985-B2 · Dec 8, 2020 · US
Engine
US-2020291874-A1 · Sep 17, 2020 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02B25/02?
- CPC F02B25/02 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F02B25/02 (Mechanical Engineering)?
- Our database includes 51 publications tagged with this CPC code.
- Is patent activity under CPC F02B25/02 growing?
- Publication counts under this code: 4 in 2024 vs 4 in 2025 (latest complete years).