- 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: 3102
10-year publication summary
|
172
|
195
|
158
|
225
|
351
|
325
|
334
|
378
|
390
|
127
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nidec Corporation | 2579 |
165 |
| Schaeffler Technologies AG & Co. KG | 8880 |
94 |
| Honda Motor Co., Ltd. | 24537 |
83 |
| Mitsubishi Electric Corporation | 43934 |
81 |
| Toyota Motor Corporation | 28582 |
69 |
| Siemens AG | 24990 |
67 |
| ZF Friedrichshafen AG | 6820 |
58 |
| Aisin AW Co., Ltd. | 2430 |
58 |
| Robert Bosch GmbH | 40953 |
57 |
| Denso Corporation | 23338 |
55 |
| Hamilton Sundstrand Corporation | 4525 |
50 |
| Nissan Motor Co., Ltd. | 12249 |
45 |
| Bayerische Motoren Werke Aktiengesellschaft | 13126 |
42 |
| BorgWarner Inc. | 2604 |
39 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
38 |
| Hitachi Astemo, Ltd. | 5618 |
37 |
| MAHLE International GmbH | 2670 |
31 |
| Aisin Corporation | 1164 |
31 |
| GE Aviation Systems LLC | 569 |
30 |
| Meidensha Corporation | 823 |
30 |
| Other owners | 1942 |