- All sections
- H - Electricity
- H02P - Control or regulation of electric motors, electric generators or dynamo-electric converterscontrolling transformers, reactors or choke coils
- H02P 1/52 - Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor by progressive increase of frequency of supply to motor
Patent holdings for IPC class H02P 1/52
Total number of patents in this class: 81
10-year publication summary
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4
|
1
|
6
|
2
|
2
|
2
|
4
|
5
|
1
|
1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Minebea Mitsumi Inc. | 1879 |
5 |
| Siemens AG | 24200 |
4 |
| Robert Bosch GmbH | 43587 |
3 |
| Allegro Microsystems, LLC | 1404 |
3 |
| Tyco Fire & Security GmbH | 3574 |
3 |
| TMEIC Corporation | 868 |
3 |
| Toshiba Corporation | 12691 |
2 |
| Hamilton Sundstrand Corporation | 5017 |
2 |
| Accessesp UK Limited | 29 |
2 |
| Lsis Co., Ltd. | 814 |
2 |
| Rocky Research | 56 |
2 |
| Safran Power UK Ltd. | 10 |
2 |
| Sanden Corporation | 1011 |
2 |
| Tula Technology, Inc. | 350 |
2 |
| Nuovo Pignone Tecnologie S.r.l. | 1143 |
2 |
| Seed Terminator Holdings Pty Ltd | 35 |
2 |
| SEG Automotive Germany GmbH | 207 |
2 |
| Copeland LP | 694 |
2 |
| Hitachi Energy Ltd. | 2496 |
2 |
| Ampere S.A.S. | 630 |
2 |
| Other owners | 32 |