- 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: 324
10-year publication summary
|
33
|
21
|
25
|
30
|
31
|
22
|
29
|
32
|
26
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24990 |
46 |
| Hamilton Sundstrand Corporation | 4525 |
17 |
| General Electric Company | 18133 |
14 |
| Nidec Corporation | 2579 |
9 |
| Johnson Controls Technology Company | 1522 |
5 |
| Safran Helicopter Engines | 676 |
5 |
| Innomotics GmbH | 451 |
5 |
| Mitsubishi Electric Corporation | 43934 |
4 |
| Rolls-Royce PLC | 2944 |
4 |
| Kawasaki Heavy Industries, Limited | 1524 |
4 |
| Rolls-Royce Deutschland Ltd & Co KG | 765 |
4 |
| Trane International Inc. | 1123 |
4 |
| Valeo Equipements Electriques Moteur | 1036 |
4 |
| Tesla, Inc. | 1519 |
4 |
| Johnson Controls Tyco IP Holdings LLP | 1584 |
4 |
| Honeywell International Inc. | 13799 |
3 |
| Schaeffler Technologies AG & Co. KG | 8880 |
3 |
| BorgWarner Inc. | 2604 |
3 |
| Fuji Corporation | 2924 |
3 |
| M-Link Co., Ltd. | 8 |
3 |
| Other owners | 176 |