- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 3/04 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
Patent holdings for IPC class F28F 3/04
Total number of patents in this class: 1122
10-year publication summary
|
86
|
112
|
129
|
118
|
101
|
123
|
76
|
70
|
74
|
33
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alfa Laval Corporate AB | 1313 |
112 |
| Valeo Systemes Thermiques | 2732 |
61 |
| Mitsubishi Electric Corporation | 46160 |
34 |
| SWEP International AB | 104 |
34 |
| Denso Corporation | 24334 |
19 |
| Hanon Systems | 1946 |
19 |
| Panasonic Intellectual Property Management Co., Ltd. | 31515 |
18 |
| Kyungdong Navien Co., Ltd. | 617 |
18 |
| Daikin Industries, Ltd. | 10016 |
16 |
| Hamilton Sundstrand Corporation | 4888 |
15 |
| Dana Canada Corporation | 273 |
14 |
| Asia Vital Components Co., Ltd. | 408 |
13 |
| Rtx Corporation | 9395 |
12 |
| Danfoss Micro Channel Heat Exchanger (Jiaxing) Co. Ltd. | 89 |
10 |
| Danfoss A/S | 1353 |
10 |
| International Business Machines Corporation | 61287 |
9 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10917 |
9 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2871 |
9 |
| MAHLE International GmbH | 2777 |
9 |
| Unison Industries, LLC | 210 |
9 |
| Other owners | 672 |