- All sections
- H - Electricity
- H02P - Control or regulation of electric motors, electric generators or dynamo-electric converterscontrolling transformers, reactors or choke coils
- H02P 21/09 - Field phase angle calculation based on rotor voltage equation by adding slip frequency and speed proportional frequency
Patent holdings for IPC class H02P 21/09
Total number of patents in this class: 67
10-year publication summary
|
1
|
3
|
3
|
12
|
13
|
9
|
10
|
3
|
9
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24323 |
3 |
| Deere & Company | 7781 |
3 |
| Toshiba Corporation | 12543 |
3 |
| Kinetic Technologies International Holdings LP | 68 |
3 |
| TMEIC Corporation | 816 |
3 |
| NSK Ltd. | 2812 |
2 |
| Arthrex, Inc. | 1543 |
2 |
| Okuma Corporation | 255 |
2 |
| Safran Electrical & Power | 713 |
2 |
| Toshiba Electronic Devices & Storage Corporation | 2111 |
2 |
| LG Electronics Inc. | 73884 |
1 |
| Hitachi Construction Machinery Co., Ltd. | 2687 |
1 |
| Robert Bosch GmbH | 43114 |
1 |
| GM Global Technology Operations LLC | 15421 |
1 |
| Denso Corporation | 24818 |
1 |
| Infineon Technologies AG | 8290 |
1 |
| Infineon Technologies Austria AG | 2224 |
1 |
| Mitsubishi Electric Corporation | 47014 |
1 |
| Delta Electronics, Inc. | 2692 |
1 |
| Rockwell Automation Technologies, Inc. | 2726 |
1 |
| Other owners | 32 |