- 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: 188
10-year publication summary
|
27
|
18
|
11
|
17
|
21
|
22
|
18
|
23
|
7
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 43934 |
7 |
| Toray Industries, Inc. | 6652 |
7 |
| Mitsubishi Paper Mills Limited | 246 |
7 |
| Toyota Motor Corporation | 28582 |
5 |
| Daikin Industries, Ltd. | 9495 |
5 |
| Microsoft Technology Licensing, LLC | 51439 |
5 |
| Raytheon Company | 8535 |
4 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
4 |
| Rheem Manufacturing Company | 861 |
4 |
| The Boeing Company | 19843 |
3 |
| Alfa Laval Corporate AB | 1265 |
3 |
| Asahi Kasei Fibers Corporation | 112 |
3 |
| Daicel Corporation | 2128 |
3 |
| SGL Carbon SE | 388 |
3 |
| General Electric Company | 18133 |
2 |
| Intel Corporation | 45621 |
2 |
| Robert Bosch GmbH | 40953 |
2 |
| Northrop Grumman Systems Corporation | 2940 |
2 |
| Beckett Gas, Inc. | 50 |
2 |
| Cosmogas S.r.l. | 25 |
2 |
| Other owners | 113 |