- All sections
- H - Electricity
- H02P - Control or regulation of electric motors, electric generators or dynamo-electric converters; controlling transformers, reactors or choke coils
- H02P 21/09 - 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: 60
10-year publication summary
0
|
1
|
3
|
3
|
12
|
13
|
9
|
11
|
3
|
3
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Deere & Company | 6845 |
3 |
Toshiba Corporation | 12017 |
3 |
Toshiba Mitsubishi-Electric Industrial Systems Corporation | 1583 |
3 |
Siemens AG | 24990 |
2 |
NSK Ltd. | 2719 |
2 |
Arthrex, Inc. | 1201 |
2 |
Nidec Corporation | 2579 |
2 |
TMEIC Corporation | 16 |
2 |
Safran Electrical & Power | 507 |
2 |
Toshiba Electronic Devices & Storage Corporation | 1602 |
2 |
LG Electronics Inc. | 69257 |
1 |
Robert Bosch GmbH | 40953 |
1 |
GM Global Technology Operations LLC | 13620 |
1 |
Denso Corporation | 23338 |
1 |
Mitsubishi Electric Corporation | 43934 |
1 |
Delta Electronics, Inc. | 2401 |
1 |
Rockwell Automation Technologies, Inc. | 2547 |
1 |
Hamilton Sundstrand Corporation | 4525 |
1 |
NTN Corporation | 5008 |
1 |
Omron Corporation | 6968 |
1 |
Other owners | 27 |