- 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: 1172
10-year publication summary
|
107
|
114
|
117
|
98
|
117
|
75
|
71
|
75
|
61
|
26
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alfa Laval Corporate AB | 1328 |
117 |
| Valeo Systemes Thermiques | 2809 |
65 |
| Mitsubishi Electric Corporation | 47556 |
34 |
| SWEP International AB | 103 |
34 |
| Denso Corporation | 25165 |
21 |
| Hanon Systems | 2067 |
21 |
| Daikin Industries, Ltd. | 10375 |
20 |
| Panasonic Intellectual Property Management Co., Ltd. | 33462 |
18 |
| Kyungdong Navien Co., Ltd. | 619 |
18 |
| Hamilton Sundstrand Corporation | 5014 |
15 |
| Dana Canada Corporation | 270 |
14 |
| Asia Vital Components Co., Ltd. | 428 |
13 |
| Rtx Corporation | 9851 |
13 |
| Danfoss Micro Channel Heat Exchanger (Jiaxing) Co. Ltd. | 89 |
10 |
| Danfoss A/S | 1395 |
10 |
| International Business Machines Corporation | 62182 |
9 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10993 |
9 |
| Fujitsu General Limited | 600 |
9 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2839 |
9 |
| MAHLE International GmbH | 2879 |
9 |
| Other owners | 704 |