- 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: 201
10-year publication summary
|
11
|
17
|
22
|
23
|
19
|
23
|
7
|
11
|
10
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 47971 |
7 |
| Toray Industries, Inc. | 7096 |
7 |
| Toyota Motor Corporation | 35680 |
5 |
| Daikin Industries, Ltd. | 10478 |
5 |
| Microsoft Technology Licensing, LLC | 54439 |
5 |
| Rheem Manufacturing Company | 1018 |
5 |
| Raytheon Company | 8457 |
4 |
| Panasonic Intellectual Property Management Co., Ltd. | 33911 |
4 |
| Mitsubishi Paper Mills Limited | 225 |
4 |
| SGL Carbon SE | 403 |
4 |
| The Boeing Company | 20160 |
3 |
| Northrop Grumman Systems Corporation | 2921 |
3 |
| Alfa Laval Corporate AB | 1335 |
3 |
| Asahi Kasei Fibers Corporation | 92 |
3 |
| Daicel Corporation | 2508 |
3 |
| Japan Exlan Company Limited | 55 |
3 |
| Lummus Technology LLC | 486 |
3 |
| General Electric Company | 13888 |
2 |
| Intel Corporation | 47102 |
2 |
| Robert Bosch GmbH | 44128 |
2 |
| Other owners | 124 |