- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F28F - Details of heat-exchange or heat-transfer apparatus, of general application
- F28F 21/02 - Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
Patent holdings for IPC class F28F 21/02
Total number of patents in this class: 358
10-year publication summary
|
43
|
37
|
55
|
53
|
68
|
39
|
26
|
30
|
16
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Raytheon Company | 8535 |
14 |
| Global Graphene Group, Inc. | 246 |
13 |
| SGL Carbon SE | 388 |
12 |
| Lockheed Martin Corporation | 3406 |
8 |
| Fractal Heatsink Technologies, LLC | 18 |
8 |
| NeoGraf Solutions, LLC | 97 |
8 |
| Kelvin Thermal Energy Inc. | 26 |
7 |
| 0908905 B.C. Ltd. | 7 |
7 |
| Apple Inc. | 50209 |
6 |
| Microsoft Technology Licensing, LLC | 51439 |
6 |
| Dexerials Corporation | 1826 |
6 |
| Denso Corporation | 23338 |
5 |
| Laird Technologies, Inc. | 385 |
5 |
| The Boeing Company | 19843 |
4 |
| Fujitsu Limited | 19265 |
4 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
4 |
| Magaldi Industrie S.r.l. | 23 |
4 |
| Photon Vault, LLC | 10 |
4 |
| Toyota Motor Corporation | 28582 |
3 |
| Dell Products L.P. | 11144 |
3 |
| Other owners | 227 |