- 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: 3897
10-year publication summary
|
152
|
222
|
343
|
315
|
331
|
382
|
409
|
421
|
401
|
99
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nidec Corporation | 2751 |
181 |
| Schaeffler Technologies AG & Co. KG | 10644 |
146 |
| Honda Motor Co., Ltd. | 25840 |
87 |
| Toyota Motor Corporation | 34313 |
86 |
| ZF Friedrichshafen AG | 7222 |
86 |
| Robert Bosch GmbH | 43504 |
75 |
| Mitsubishi Electric Corporation | 47511 |
70 |
| Denso Corporation | 25115 |
64 |
| Siemens AG | 24250 |
61 |
| Bayerische Motoren Werke Aktiengesellschaft | 14955 |
59 |
| Aisin AW Co., Ltd. | 2276 |
56 |
| Hamilton Sundstrand Corporation | 5013 |
56 |
| Aisin Corporation | 1750 |
55 |
| BorgWarner Inc. | 2588 |
50 |
| Nissan Motor Co., Ltd. | 12731 |
45 |
| MAHLE International GmbH | 2864 |
42 |
| Hitachi Astemo, Ltd. | 6403 |
42 |
| Huawei Digital Power Technologies Co. Ltd. | 2436 |
42 |
| Meidensha Corporation | 923 |
41 |
| GM Global Technology Operations LLC | 15722 |
37 |
| Other owners | 2516 |