- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- 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
|
16
|
10
|
14
|
20
|
20
|
16
|
21
|
6
|
10
|
8
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 46765 |
7 |
| Toray Industries, Inc. | 7004 |
7 |
| Toyota Motor Corporation | 33275 |
5 |
| Daikin Industries, Ltd. | 10142 |
5 |
| Microsoft Technology Licensing, LLC | 54162 |
5 |
| Rheem Manufacturing Company | 991 |
5 |
| Raytheon Company | 8399 |
4 |
| Panasonic Intellectual Property Management Co., Ltd. | 32244 |
4 |
| Mitsubishi Paper Mills Limited | 230 |
4 |
| SGL Carbon SE | 391 |
4 |
| The Boeing Company | 20161 |
3 |
| Northrop Grumman Systems Corporation | 2936 |
3 |
| Alfa Laval Corporate AB | 1322 |
3 |
| Asahi Kasei Fibers Corporation | 98 |
3 |
| Daicel Corporation | 2398 |
3 |
| Lummus Technology LLC | 454 |
3 |
| General Electric Company | 13859 |
2 |
| Intel Corporation | 46703 |
2 |
| Robert Bosch GmbH | 42984 |
2 |
| University of Southern California | 2123 |
2 |
| Other owners | 120 |