- 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: 3390
10-year publication summary
|
195
|
158
|
225
|
351
|
322
|
339
|
387
|
400
|
406
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nidec Corporation | 2601 |
174 |
| Schaeffler Technologies AG & Co. KG | 9386 |
121 |
| Honda Motor Co., Ltd. | 24868 |
82 |
| Toyota Motor Corporation | 30398 |
74 |
| ZF Friedrichshafen AG | 7020 |
73 |
| Siemens AG | 24573 |
67 |
| Mitsubishi Electric Corporation | 44794 |
65 |
| Robert Bosch GmbH | 41765 |
62 |
| Aisin AW Co., Ltd. | 2364 |
57 |
| Denso Corporation | 23747 |
55 |
| Hamilton Sundstrand Corporation | 4724 |
54 |
| Bayerische Motoren Werke Aktiengesellschaft | 13850 |
50 |
| Nissan Motor Co., Ltd. | 12337 |
43 |
| BorgWarner Inc. | 2587 |
41 |
| Hitachi Astemo, Ltd. | 6076 |
41 |
| Aisin Corporation | 1404 |
41 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13096 |
39 |
| Meidensha Corporation | 854 |
34 |
| MAHLE International GmbH | 2691 |
33 |
| GM Global Technology Operations LLC | 14229 |
32 |
| Other owners | 2152 |