Heat exchanger
US-12578121-B2 · Mar 17, 2026 · US
by tubes
by tubes · 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 | F24H3/08 |
| Official title | by tubes |
| Display label | by tubes |
| Total patents | 26 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Air handling unit
US-12429248-B2 · Sep 30, 2025 · US
Fluid control apparatus
US-12152685-B2 · Nov 26, 2024 · US
Heat Exchanger
US-2024271823-A1 · Aug 15, 2024 · US
Air handling unit
US-2024219070-A1 · Jul 4, 2024 · US
Air handling unit
US-11927364-B2 · Mar 12, 2024 · US
Systems and methods for using a smart valve to control conditioned air
US-11649982-B2 · May 16, 2023 · US
Air handling unit
US-2022205683-A1 · Jun 30, 2022 · US
Fluid control apparatus
US-2022120355-A1 · Apr 21, 2022 · US
Systems and methods for fault detection using smart valves
US-11306927-B2 · Apr 19, 2022 · US
Block heater and block heater assembly
US-2022074624-A1 · Mar 10, 2022 · US
High efficiency mode-dependent heating and cooling systems
US-2021333000-A1 · Oct 28, 2021 · US
Gas analyzer
US-2021055214-A1 · Feb 25, 2021 · US
Systems and methods for using a smart valve to control conditioned air
US-2020370766-A1 · Nov 26, 2020 · US
Systems and methods for using a smart valve to control conditioned air
US-10739021-B2 · Aug 11, 2020 · US
Systems and methods for fault detection using smart valves
US-2020063990-A1 · Feb 27, 2020 · US
Systems and methods for fault detection using smart valves
US-10465925-B2 · Nov 5, 2019 · US
Compact air handler with multiple fans
US-2019154283-A1 · May 23, 2019 · US
Air handling system and method for assembling the same
US-2019145635-A1 · May 16, 2019 · US
Compact air handler with multiple fans
US-10215431-B2 · Feb 26, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24H3/08?
- CPC F24H3/08 is the Cooperative Patent Classification code for “by tubes.”
- How many patents are filed under CPC F24H3/08 (by tubes)?
- Our database includes 26 publications tagged with this CPC code.
- Is patent activity under CPC F24H3/08 growing?
- Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).