Engine device
US-2025290473-A1 · Sep 18, 2025 · US
the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)}
the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)} · 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 | F02M31/08 |
| Official title | the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)} |
| Display label | the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)} |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 4 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Engine device
US-2025290471-A1 · Sep 18, 2025 · US
Engine device
US-2025290476-A1 · Sep 18, 2025 · US
Reconfigurable surgical frame and method for use thereof
US-2025109725-A1 · Apr 3, 2025 · US
Reconfigurable surgical frame and method for use thereof
US-12123381-B2 · Oct 22, 2024 · US
Combustion engine with a fuel reformer and distiller assembly
US-11815038-B2 · Nov 14, 2023 · US
Combustion engine with a fuel reformer and distiller assembly
US-2023265803-A1 · Aug 24, 2023 · US
Reconfigurable surgical frame and method for use thereof
US-2023243323-A1 · Aug 3, 2023 · US
Reconfigurable surgical frame and method for use thereof
US-11624342-B2 · Apr 11, 2023 · US
Vehicle and control method thereof
US-11541872-B2 · Jan 3, 2023 · US
Vehicle system with fuel separation system and method of using same
US-11339754-B1 · May 24, 2022 · US
Vehicle and control method thereof
US-2022080951-A1 · Mar 17, 2022 · US
Vehicle and control method thereof
US-11214243-B2 · Jan 4, 2022 · US
Internal combustion engine
US-2021189953-A1 · Jun 24, 2021 · US
Reconfigurable surgical frame and method for use thereof
US-2021140395-A1 · May 13, 2021 · US
Internal combustion engine
US-10989107-B2 · Apr 27, 2021 · US
Vehicle and control method thereof
US-2021107452-A1 · Apr 15, 2021 · US
Engine system control device
US-10941724-B2 · Mar 9, 2021 · US
Reconfigurable surgical frame and method for use thereof
US-10900448-B2 · Jan 26, 2021 · US
Air intake heater system for a combustion engine, method for heating intake air and a vehicle comprising such a system
US-10865745-B2 · Dec 15, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02M31/08?
- CPC F02M31/08 is the Cooperative Patent Classification code for “the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)}.”
- How many patents are filed under CPC F02M31/08 (the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)})?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC F02M31/08 growing?
- Publication counts under this code: 1 in 2024 vs 4 in 2025 (latest complete years).