Combustion chamber and gas apparatus
US-12442531-B2 · Oct 14, 2025 · US
in air inlets
in air inlets · 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 | F23M9/02 |
| Official title | in air inlets |
| Display label | in air inlets |
| Total patents | 40 |
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 | 3 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 6 |
| 2020 | 1 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Flow-directing element, flow-directing system and heating apparatus
US-12246581-B2 · Mar 11, 2025 · US
Gas distribution component for burner
US-2025003585-A1 · Jan 2, 2025 · US
Arrangement having two burners
US-11920785-B2 · Mar 5, 2024 · US
Velocity damper for a recovery boiler
US-11719433-B2 · Aug 8, 2023 · US
Flow-directing element, flow-directing system and heating apparatus
US-2023051497-A1 · Feb 16, 2023 · US
Steam generator and car washer with steam generator
US-11525572-B2 · Dec 13, 2022 · US
Combustion chamber and gas apparatus
US-2022373178-A1 · Nov 24, 2022 · US
Velocity damper for a recovery boiler
US-2022065447-A1 · Mar 3, 2022 · US
Velocity damper for a recovery boiler
US-11226095-B2 · Jan 18, 2022 · US
Steam Generator and Car Washer with Steam Generator
US-2021364162-A1 · Nov 25, 2021 · US
Combustor and gas turbine including the same
US-11143405-B2 · Oct 12, 2021 · US
Arrangement Having Two Burners
US-2021310653-A1 · Oct 7, 2021 · US
Additional primary air access for surface gas burners
US-11098891-B2 · Aug 24, 2021 · US
Velocity damper for a recovery boiler
US-2020240635-A1 · Jul 30, 2020 · US
Premixed stamped inner flames burner with eccentric injection venturi
US-10352558-B2 · Jul 16, 2019 · US
Additional primary air access for surface gas burners
US-2019154253-A1 · May 23, 2019 · US
Combustor and gas turbine including the same
US-2019128525-A1 · May 2, 2019 · US
Inflow element, especially for a combustion air flow path in a vehicle heater
US-10259289-B2 · Apr 16, 2019 · US
Additional primary air access for surface gas burners
US-10228128-B2 · Mar 12, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23M9/02?
- CPC F23M9/02 is the Cooperative Patent Classification code for “in air inlets.”
- How many patents are filed under CPC F23M9/02 (in air inlets)?
- Our database includes 40 publications tagged with this CPC code.
- Is patent activity under CPC F23M9/02 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).