Air cooler and fuel cell system
US-12431514-B2 · Sep 30, 2025 · US
Mechanical Engineering
Mechanical Engineering · 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 | F28F1/18 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 37 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 8 |
| 2022 | 7 |
| 2023 | 3 |
| 2024 | 8 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Energy storage system
US-12334531-B2 · Jun 17, 2025 · US
Varied flow stacked radiators
US-2025123056-A1 · Apr 17, 2025 · US
Helical fractal heat exchanger
US-12173971-B2 · Dec 24, 2024 · US
Heat exchanger and heat exchanger manufacturing method
US-12111118-B2 · Oct 8, 2024 · US
Micro-channel heat exchanger and heat pump system having the same
US-2024310130-A1 · Sep 19, 2024 · US
Heat exchanger and cooling method
US-11994346-B2 · May 28, 2024 · US
Heat exchange tube, processing method for same, and heat exchanger having same
US-11927404-B2 · Mar 12, 2024 · US
Heat exchange tube, heat exchanger, and manufacturing method for heat exchange tube
US-11920875-B2 · Mar 5, 2024 · US
Heat exchanger with heat transfer augmentation features
US-2024044587-A1 · Feb 8, 2024 · US
Heat exchanger and heat exchanger manufacturing method
US-2024011721-A1 · Jan 11, 2024 · US
Optimized heat exchange system for a turbomachine
US-11655761-B2 · May 23, 2023 · US
Air cooler and fuel cell system
US-2023099737-A1 · Mar 30, 2023 · US
Air-oil heat exchanger
US-11549393-B2 · Jan 10, 2023 · US
Vortex-enhanced heat exchanger
US-11519679-B2 · Dec 6, 2022 · US
Heat exchanger, heat exchanger unit, and refrigeration cycle apparatus
US-2022373264-A1 · Nov 24, 2022 · US
Energy storage system
US-2022367944-A1 · Nov 17, 2022 · US
Heat exchanger, heat exchange unit, refrigeration cycle apparatus, and method for manufacturing heat exchange member
US-2022316812-A1 · Oct 6, 2022 · US
Optimized heat exchange system for a turbomachine
US-2022235704-A1 · Jul 28, 2022 · US
Heat exchanger and cooling method
US-2022221227-A1 · Jul 14, 2022 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28F1/18?
- CPC F28F1/18 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F28F1/18 (Mechanical Engineering)?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC F28F1/18 growing?
- Publication counts under this code: 8 in 2024 vs 3 in 2025 (latest complete years).