System and a method for reducing hydrogen knocking in a hydrogen internal combustion engine
US-12529346-B1 · Jan 20, 2026 · US
having screens, gratings, baffles or the like
having screens, gratings, baffles or the like · 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 | F02M29/04 |
| Official title | having screens, gratings, baffles or the like |
| Display label | having screens, gratings, baffles or the like |
| Total patents | 29 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 6 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gaseous fuel-air mixer with higher mixture uniformity
US-12292018-B2 · May 6, 2025 · US
Gaseous fuel-air mixer with higher mixture uniformity
US-2024344491-A1 · Oct 17, 2024 · US
Gaseous fuel-air mixer with higher mixture uniformity
US-11933250-B2 · Mar 19, 2024 · US
Gaseous fuel-air mixer with higher mixture uniformity
US-2023313760-A1 · Oct 5, 2023 · US
Gas engine power generation system
US-11428194-B2 · Aug 30, 2022 · US
Compression-ignition internal combustion engine
US-11300046-B2 · Apr 12, 2022 · US
Bluff body combustion system for an internal combustion engine
US-11236711-B2 · Feb 1, 2022 · US
Gas engine power generation system
US-2021095621-A1 · Apr 1, 2021 · US
Charge air cooler condensation dispersion element
US-10914229-B2 · Feb 9, 2021 · US
Bluff body combustion system for an internal combustion engine
US-2020408175-A1 · Dec 31, 2020 · US
Controlled air entrainment passage for diesel engines
US-10641160-B2 · May 5, 2020 · US
Compression-ignition internal combustion engine
US-2020011236-A1 · Jan 9, 2020 · US
Combustion system for an internal combustion engine
US-2019301408-A1 · Oct 3, 2019 · US
Controlled air entrainment passage for diesel engines
US-2019003371-A1 · Jan 3, 2019 · US
Controlled air entrainment passage for diesel engines
US-10060334-B2 · Aug 28, 2018 · US
Controlled air entrainment passage for diesel engines
US-2017350308-A1 · Dec 7, 2017 · US
Mixing valve of an internal combustion engine
US-9765732-B2 · Sep 19, 2017 · US
Motor response control method in variable charge motion system
US-9732683-B2 · Aug 15, 2017 · US
Sealing device
US-9506432-B2 · Nov 29, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F02M29/04?
- CPC F02M29/04 is the Cooperative Patent Classification code for “having screens, gratings, baffles or the like.”
- How many patents are filed under CPC F02M29/04 (having screens, gratings, baffles or the like)?
- Our database includes 29 publications tagged with this CPC code.
- Is patent activity under CPC F02M29/04 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).