- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- 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: 175
10-year publication summary
|
12
|
22
|
29
|
31
|
28
|
20
|
16
|
15
|
11
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 43934 |
11 |
| Hamilton Sundstrand Corporation | 4525 |
10 |
| Dana Canada Corporation | 284 |
6 |
| Daikin Industries, Ltd. | 9495 |
5 |
| Hanon Systems | 1632 |
5 |
| Kyungdong Navien Co., Ltd. | 566 |
5 |
| Modine Manufacturing Company | 305 |
5 |
| Rtx Corporation | 8674 |
5 |
| Denso Corporation | 23338 |
4 |
| Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | 110 |
4 |
| Valeo Systemes Thermiques | 2471 |
4 |
| Abaco Systems, Inc . | 34 |
3 |
| MAHLE International GmbH | 2670 |
3 |
| Dallmann Engineering & Service | 3 |
3 |
| The Furukawa Electric Co., Ltd. | 3486 |
2 |
| Behr GmbH & Co. KG | 437 |
2 |
| Evapco, Inc. | 244 |
2 |
| Flint Engineering Limited | 10 |
2 |
| Fujitsu General Limited | 541 |
2 |
| GE Aviation Systems LLC | 569 |
2 |
| Other owners | 90 |