- All sections
- H - Electricity
- H02P - Control or regulation of electric motors, electric generators or dynamo-electric converterscontrolling transformers, reactors or choke coils
- H02P 7/291 - Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation with on-off control between two set points, e.g. controlling by hysteresis
Patent holdings for IPC class H02P 7/291
Total number of patents in this class: 22
10-year publication summary
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1
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2
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3
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4
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0
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5
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0
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1
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2
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Denso Corporation | 25115 |
3 |
| Amazon Technologies, Inc. | 27637 |
3 |
| Assa Abloy Entrance Systems AB | 609 |
2 |
| The Swatch Group Research and Development Ltd | 870 |
2 |
| Toyota Motor Corporation | 34313 |
1 |
| Hyundai Motor Company | 23479 |
1 |
| Carrier Corporation | 3971 |
1 |
| Cirrus Logic International Semiconductor Ltd. | 919 |
1 |
| EBM-Papst St. Georgen GmbH & Co. KG | 232 |
1 |
| Global Mixed-mode Technology Inc. | 39 |
1 |
| Kabushiki Kaisha Tokai Rika Denki Seisakusho | 1839 |
1 |
| Nanjing Chervon Industry Co., Ltd. | 1200 |
1 |
| Richtek Technology Corp. | 655 |
1 |
| Won-Door Corporation | 101 |
1 |
| Tata ELXSI Limited | 9 |
1 |
| Kia Corporation | 11227 |
1 |
| Other owners | 0 |