- 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: 194
10-year publication summary
|
29
|
27
|
27
|
20
|
15
|
15
|
12
|
21
|
9
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 47302 |
15 |
| Hamilton Sundstrand Corporation | 4994 |
11 |
| Daikin Industries, Ltd. | 10214 |
7 |
| Zhejiang DunAn Artificial Environment Co., Ltd | 617 |
7 |
| Dana Canada Corporation | 271 |
6 |
| Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | 148 |
6 |
| Hanon Systems | 2034 |
5 |
| Kyungdong Navien Co., Ltd. | 621 |
5 |
| Modine Manufacturing Company | 308 |
5 |
| Rtx Corporation | 9737 |
5 |
| MAHLE International GmbH | 2841 |
4 |
| Valeo Systemes Thermiques | 2792 |
4 |
| Denso Corporation | 24965 |
3 |
| Abaco Systems, Inc . | 31 |
3 |
| RIELLO S.p.A. | 52 |
3 |
| Dallmann Engineering & Service | 3 |
3 |
| The Furukawa Electric Co., Ltd. | 3710 |
2 |
| Evapco, Inc. | 303 |
2 |
| Flint Engineering Limited | 11 |
2 |
| Fujitsu General Limited | 631 |
2 |
| Other owners | 94 |