Water heater
US-2025237384-A1 · Jul 24, 2025 · US
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at the air intake
at the air intake · 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 | F23N2233/06 |
| Official title | at the air intake |
| Display label | at the air intake |
| Total patents | 11 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 2 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Collective exhaust system
US-12276421-B2 · Apr 15, 2025 · US
Counter-flow heat reduction cycle
US-2024263780-A1 · Aug 8, 2024 · US
Collective exhaust system
US-2022412558-A1 · Dec 29, 2022 · US
Water heating device
US-11506421-B2 · Nov 22, 2022 · US
Water heating device
US-2021131702-A1 · May 6, 2021 · US
Boosted gas burner assembly with operating time and fuel type compensation
US-10782018-B2 · Sep 22, 2020 · US
Boosted gas burner assembly with operating time and fuel type compensation
US-2020240630-A1 · Jul 30, 2020 · US
Water heating system
US-10337763-B2 · Jul 2, 2019 · US
Water heating system
US-2018252437-A1 · Sep 6, 2018 · US
Home appliance with supplemental primary air supply
US-9341381-B2 · May 17, 2016 · US