Internal combustion engine and cylinder block
US-12523187-B2 · Jan 13, 2026 · US
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Oval or square cylinders
Oval or square cylinders · 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 | F02F1/183 |
| Official title | {Oval or square cylinders} |
| Display label | Oval or square cylinders |
| Total patents | 18 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2019 | 4 |
| 2020 | 5 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Driving engine for vehicles
US-12429011-B2 · Sep 30, 2025 · US
Driving engine for vehicles
US-2025075671-A1 · Mar 6, 2025 · US
Internal combustion engine and cylinder block
US-2024328370-A1 · Oct 3, 2024 · US
Internal combustion engine
US-12000354-B2 · Jun 4, 2024 · US
Internal combustion engine
US-2023332558-A1 · Oct 19, 2023 · US
Engine block for an internal combustion engine
US-11480131-B2 · Oct 25, 2022 · US
Cylinder head
US-11092044-B2 · Aug 17, 2021 · US
Internal-combustion engine with direct fuel injection in the direction of the intake gas motion
US-10871101-B2 · Dec 22, 2020 · US
Cylinder head
US-2020378279-A1 · Dec 3, 2020 · US
Elliptically-shaped combustion chamber
US-10787954-B2 · Sep 29, 2020 · US
Internal combustion engine
US-10760524-B2 · Sep 1, 2020 · US
Engine block for an internal combustion engine
US-2020088126-A1 · Mar 19, 2020 · US
Internal combustion engine
US-2019338723-A1 · Nov 7, 2019 · US
Internal-combustion engine with direct fuel injection in the direction of the intake gas motion
US-2019101048-A1 · Apr 4, 2019 · US
Two-valve internal-combustion engine
US-2019101047-A1 · Apr 4, 2019 · US
Elliptically-shaped combustion chamber
US-2019101049-A1 · Apr 4, 2019 · US
Piston Engine with Non-Circular Combustion Chamber
US-2016017839-A1 · Jan 21, 2016 · US