- All sections
- H - Electricity
- H02P - Control or regulation of electric motors, electric generators or dynamo-electric converters; controlling transformers, reactors or choke coils
- H02P 21/16 - Estimation of constants, e.g. the rotor time constant
Patent holdings for IPC class H02P 21/16
Total number of patents in this class: 98
10-year publication summary
|
2
|
4
|
5
|
6
|
20
|
16
|
18
|
13
|
12
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Industrial Equipment Systems Co., Ltd. | 1334 |
12 |
| Mitsubishi Electric Corporation | 43934 |
6 |
| Robert Bosch GmbH | 40953 |
5 |
| GM Global Technology Operations LLC | 13620 |
5 |
| Denso Corporation | 23338 |
4 |
| Samsung Electronics Co., Ltd. | 131630 |
3 |
| Infineon Technologies Austria AG | 1954 |
3 |
| Danfoss Power Electronics A/S | 110 |
3 |
| Hyundai Motor Company | 19021 |
2 |
| NSK Ltd. | 2719 |
2 |
| ABB Schweiz AG | 6321 |
2 |
| Huazhong University of Science and Technology | 930 |
2 |
| Jiangsu University | 950 |
2 |
| Kabushiki Kaisha Yaskawa Denki | 1468 |
2 |
| Lsis Co., Ltd. | 834 |
2 |
| Nidec Corporation | 2579 |
2 |
| Wobben Properties GmbH | 1207 |
2 |
| Seoul National University R&db Foundation | 2976 |
2 |
| Hitachi Astemo, Ltd. | 5618 |
2 |
| Siemens AG | 24990 |
1 |
| Other owners | 34 |