- 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: 201
10-year publication summary
|
29
|
31
|
28
|
20
|
16
|
15
|
12
|
23
|
10
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 48018 |
16 |
| Hamilton Sundstrand Corporation | 5015 |
11 |
| Daikin Industries, Ltd. | 10499 |
8 |
| Zhejiang DunAn Artificial Environment Co., Ltd | 703 |
8 |
| Dana Canada Corporation | 268 |
6 |
| Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | 156 |
6 |
| Hanon Systems | 2106 |
5 |
| Kyungdong Navien Co., Ltd. | 643 |
5 |
| Modine Manufacturing Company | 302 |
5 |
| Valeo Systemes Thermiques | 2825 |
5 |
| Rtx Corporation | 10102 |
5 |
| MAHLE International GmbH | 2911 |
4 |
| Denso Corporation | 25534 |
3 |
| Abaco Systems, Inc . | 31 |
3 |
| RIELLO S.p.A. | 51 |
3 |
| Dallmann Engineering & Service | 3 |
3 |
| The Furukawa Electric Co., Ltd. | 3694 |
2 |
| Evapco, Inc. | 310 |
2 |
| Flint Engineering Limited | 12 |
2 |
| Fujitsu General Limited | 596 |
2 |
| Other owners | 97 |