- All sections
- H - Electricity
- H02K - Dynamo-electric machines
- H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
Patent holdings for IPC class H02K 9/20
Total number of patents in this class: 345
10-year publication summary
|
21
|
25
|
30
|
31
|
22
|
29
|
32
|
26
|
30
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24573 |
43 |
| General Electric Company | 17783 |
17 |
| Hamilton Sundstrand Corporation | 4724 |
17 |
| Nidec Corporation | 2601 |
8 |
| Innomotics GmbH | 507 |
6 |
| Johnson Controls Technology Company | 1480 |
5 |
| Safran Helicopter Engines | 724 |
5 |
| Raytheon Company | 8435 |
4 |
| Rolls-Royce PLC | 2988 |
4 |
| Kawasaki Heavy Industries, Limited | 1585 |
4 |
| Rolls-Royce Deutschland Ltd & Co KG | 795 |
4 |
| Trane International Inc. | 1149 |
4 |
| Valeo Equipements Electriques Moteur | 1020 |
4 |
| Tesla, Inc. | 1631 |
4 |
| Johnson Controls Tyco IP Holdings LLP | 715 |
4 |
| Honeywell International Inc. | 14012 |
3 |
| Mitsubishi Electric Corporation | 44794 |
3 |
| Hyundai Motor Company | 20442 |
3 |
| Schaeffler Technologies AG & Co. KG | 9386 |
3 |
| BorgWarner Inc. | 2587 |
3 |
| Other owners | 197 |