Hydrogen engine
US-12546248-B2 · Feb 10, 2026 · US
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Gas
Gas · 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 | F02B2201/04 |
| Official title | Gas |
| Display label | Gas |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Engine device
US-2025354527-A1 · Nov 20, 2025 · US
Hydrogen engine
US-2025257684-A1 · Aug 14, 2025 · US
Internal combustion engine for gaseous fuel
US-12253046-B2 · Mar 18, 2025 · US
Hydrogen supply device and hydrogen engine vehicle
US-12055092-B1 · Aug 6, 2024 · US
Cylinder head for an internal combustion engine and an internal combustion engine with such a cylinder head
US-2024209770-A1 · Jun 27, 2024 · US
Internal combustion engine for gaseous fuel
US-2024068426-A1 · Feb 29, 2024 · US
Internal combustion engine for gaseous fuel
US-11840984-B2 · Dec 12, 2023 · US
Internal combustion engine for gaseous fuel
US-2023193848-A1 · Jun 22, 2023 · US
Cylinder head for an internal combustion engine
US-11680511-B2 · Jun 20, 2023 · US
Method for operation of an industrial plant and an industrial plant
US-2023100914-A1 · Mar 30, 2023 · US
Cylinder head for an internal combustion engine
US-2022074341-A1 · Mar 10, 2022 · US
Biomass gasification power generation system and power generation method
US-2021215095-A1 · Jul 15, 2021 · US
Internal combustion engine
US-10753273-B2 · Aug 25, 2020 · US
Internal combustion engine
US-10323566-B2 · Jun 18, 2019 · US
Feedback controlled system for ignition promoter droplet generation
US-9976518-B2 · May 22, 2018 · US
Internal combustion engine
US-2018135505-A1 · May 17, 2018 · US
Feedback controlled system for ignition promoter droplet generation
US-2017159615-A1 · Jun 8, 2017 · US
Internal combustion engine
US-2016169085-A1 · Jun 16, 2016 · US