- All sections
- H - Electricity
- H02K - Dynamo-electric machines
- H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Patent holdings for IPC class H02K 9/19
Total number of patents in this class: 3741
10-year publication summary
|
192
|
152
|
222
|
343
|
315
|
331
|
382
|
407
|
417
|
354
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nidec Corporation | 2690 |
177 |
| Schaeffler Technologies AG & Co. KG | 10094 |
138 |
| Honda Motor Co., Ltd. | 25774 |
85 |
| Toyota Motor Corporation | 33183 |
84 |
| ZF Friedrichshafen AG | 7177 |
79 |
| Robert Bosch GmbH | 42922 |
70 |
| Mitsubishi Electric Corporation | 46734 |
69 |
| Denso Corporation | 24652 |
63 |
| Siemens AG | 24366 |
62 |
| Bayerische Motoren Werke Aktiengesellschaft | 14577 |
58 |
| Aisin AW Co., Ltd. | 2314 |
56 |
| Hamilton Sundstrand Corporation | 4940 |
55 |
| Aisin Corporation | 1662 |
52 |
| BorgWarner Inc. | 2608 |
48 |
| Nissan Motor Co., Ltd. | 12618 |
46 |
| Hitachi Astemo, Ltd. | 6377 |
42 |
| Meidensha Corporation | 904 |
39 |
| MAHLE International GmbH | 2817 |
38 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12707 |
37 |
| Huawei Digital Power Technologies Co. Ltd. | 2284 |
37 |
| Other owners | 2406 |