- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 1/42 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
Patent holdings for IPC class F28F 1/42
Total number of patents in this class: 289
10-year publication summary
|
31
|
31
|
32
|
20
|
33
|
12
|
13
|
10
|
7
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Wieland-Werke AG | 351 |
32 |
| Mitsubishi Electric Corporation | 47556 |
14 |
| AIC S.A. | 50 |
8 |
| Hanon Systems | 2067 |
7 |
| New Power Concepts LLC | 26 |
6 |
| Valeo Systemes Thermiques | 2809 |
6 |
| Uop LLC | 4307 |
5 |
| Heatcraft Refrigeration Products LLC | 262 |
5 |
| MAHLE International GmbH | 2879 |
5 |
| UACJ Corporation | 723 |
5 |
| Denso Corporation | 25165 |
4 |
| Hamilton Sundstrand Corporation | 5014 |
4 |
| GREE Electric Appliances, Inc. of Zhuhai | 3276 |
4 |
| General Electric Company | 13819 |
3 |
| LG Electronics Inc. | 74953 |
3 |
| Dometic Sweden AB | 582 |
3 |
| Saudi Arabian Oil Company | 13943 |
3 |
| Trane International Inc. | 1214 |
3 |
| Rtx Corporation | 9851 |
3 |
| Samsung Electronics Co., Ltd. | 153573 |
2 |
| Other owners | 164 |