- All sections
- H - Electricity
- H02K - Dynamo-electric machines
- H02K 21/04 - Windings on magnets for additional excitation
Patent holdings for IPC class H02K 21/04
Total number of patents in this class: 273
10-year publication summary
|
25
|
17
|
27
|
37
|
22
|
23
|
16
|
10
|
9
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Denso Corporation | 24588 |
28 |
| Valeo Equipements Electriques Moteur | 992 |
24 |
| Robert Bosch GmbH | 42861 |
15 |
| Mitsubishi Electric Corporation | 46618 |
11 |
| Hamilton Sundstrand Corporation | 4932 |
11 |
| Daikin Industries, Ltd. | 10112 |
10 |
| Nagoya Institute of Technology | 233 |
9 |
| Milwaukee Electric Tool Corporation | 4495 |
8 |
| Siemens AG | 24346 |
7 |
| Purdue Research Foundation | 3687 |
4 |
| Exedy Corporation | 488 |
4 |
| Tau Motors, Inc. | 65 |
4 |
| Rapid Power Industries | 6 |
4 |
| Phinia Technologies Inc. | 81 |
4 |
| Toshiba Corporation | 12514 |
3 |
| Aisin AW Co., Ltd. | 2319 |
3 |
| Schaeffler Technologies AG & Co. KG | 10056 |
3 |
| Kura Laboratory Corporation | 5 |
3 |
| Magnomatics Limited | 63 |
3 |
| SEG Automotive Germany GmbH | 206 |
3 |
| Other owners | 112 |