- 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: 276
10-year publication summary
|
17
|
27
|
37
|
22
|
23
|
18
|
10
|
10
|
10
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Denso Corporation | 25676 |
28 |
| Valeo Equipements Electriques Moteur | 937 |
24 |
| Robert Bosch GmbH | 44252 |
15 |
| Mitsubishi Electric Corporation | 48236 |
12 |
| Hamilton Sundstrand Corporation | 5013 |
11 |
| Daikin Industries, Ltd. | 10513 |
10 |
| Nagoya Institute of Technology | 256 |
9 |
| Milwaukee Electric Tool Corporation | 5004 |
8 |
| Rapid Power Industries | 8 |
6 |
| Siemens AG | 23983 |
5 |
| Purdue Research Foundation | 3941 |
4 |
| Exedy Corporation | 501 |
4 |
| Tau Motors, Inc. | 82 |
4 |
| Phinia Technologies Inc. | 80 |
4 |
| GM Global Technology Operations LLC | 16205 |
3 |
| Aisin AW Co., Ltd. | 2250 |
3 |
| Schaeffler Technologies AG & Co. KG | 11125 |
3 |
| Kura Laboratory Corporation | 5 |
3 |
| Magnomatics Limited | 62 |
3 |
| SEG Automotive Germany GmbH | 206 |
3 |
| Other owners | 114 |