- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 21/00 - Constructions of heat-exchange apparatus characterised by the selection of particular materials
Patent holdings for IPC class F28F 21/00
Total number of patents in this class: 196
10-year publication summary
|
18
|
11
|
17
|
22
|
23
|
19
|
23
|
7
|
10
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 44794 |
7 |
| Toray Industries, Inc. | 6848 |
7 |
| Mitsubishi Paper Mills Limited | 234 |
6 |
| Toyota Motor Corporation | 30398 |
5 |
| Daikin Industries, Ltd. | 9836 |
5 |
| Microsoft Technology Licensing, LLC | 52893 |
5 |
| Rheem Manufacturing Company | 920 |
5 |
| Raytheon Company | 8435 |
4 |
| Panasonic Intellectual Property Management Co., Ltd. | 29687 |
4 |
| The Boeing Company | 19909 |
3 |
| Northrop Grumman Systems Corporation | 2922 |
3 |
| Alfa Laval Corporate AB | 1305 |
3 |
| Asahi Kasei Fibers Corporation | 104 |
3 |
| Daicel Corporation | 2242 |
3 |
| SGL Carbon SE | 386 |
3 |
| Lummus Technology LLC | 391 |
3 |
| General Electric Company | 17783 |
2 |
| Intel Corporation | 46119 |
2 |
| Robert Bosch GmbH | 41765 |
2 |
| University of Southern California | 2076 |
2 |
| Other owners | 119 |