- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 1/04 - Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
Patent holdings for IPC class F28F 1/04
Total number of patents in this class: 188
10-year publication summary
|
22
|
29
|
31
|
28
|
20
|
16
|
15
|
11
|
21
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 44851 |
14 |
| Hamilton Sundstrand Corporation | 4728 |
11 |
| Daikin Industries, Ltd. | 9838 |
6 |
| Dana Canada Corporation | 276 |
6 |
| Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | 128 |
6 |
| Hanon Systems | 1819 |
5 |
| Kyungdong Navien Co., Ltd. | 594 |
5 |
| Modine Manufacturing Company | 299 |
5 |
| Zhejiang DunAn Artificial Environment Co., Ltd | 491 |
5 |
| Rtx Corporation | 9109 |
5 |
| Denso Corporation | 23769 |
4 |
| MAHLE International GmbH | 2705 |
4 |
| Valeo Systemes Thermiques | 2600 |
4 |
| Abaco Systems, Inc . | 35 |
3 |
| Dallmann Engineering & Service | 3 |
3 |
| The Furukawa Electric Co., Ltd. | 3600 |
2 |
| Behr GmbH & Co. KG | 349 |
2 |
| Evapco, Inc. | 280 |
2 |
| Flint Engineering Limited | 10 |
2 |
| Fujitsu General Limited | 579 |
2 |
| Other owners | 92 |