- 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
|
10
|
14
|
20
|
20
|
16
|
21
|
6
|
10
|
8
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 47556 |
7 |
| Toray Industries, Inc. | 7036 |
7 |
| Toyota Motor Corporation | 34545 |
5 |
| Daikin Industries, Ltd. | 10375 |
5 |
| Microsoft Technology Licensing, LLC | 54215 |
5 |
| Rheem Manufacturing Company | 991 |
5 |
| Raytheon Company | 8463 |
4 |
| Panasonic Intellectual Property Management Co., Ltd. | 33462 |
4 |
| Mitsubishi Paper Mills Limited | 228 |
4 |
| SGL Carbon SE | 399 |
4 |
| The Boeing Company | 20094 |
3 |
| Northrop Grumman Systems Corporation | 2929 |
3 |
| Alfa Laval Corporate AB | 1328 |
3 |
| Asahi Kasei Fibers Corporation | 95 |
3 |
| Daicel Corporation | 2459 |
3 |
| Lummus Technology LLC | 475 |
3 |
| General Electric Company | 13819 |
2 |
| Intel Corporation | 46638 |
2 |
| Robert Bosch GmbH | 43554 |
2 |
| University of Southern California | 2116 |
2 |
| Other owners | 120 |