- All sections
- H - Electricity
- H01H - Electric switchesrelaysselectorsemergency protective devices
- H01H 21/20 - Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
Patent holdings for IPC class H01H 21/20
Total number of patents in this class: 3
10-year publication summary
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0
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0
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0
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1
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1
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1
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0
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1
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0
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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
|
|---|---|---|
| Hubbell Incorporated | 3359 |
2 |
| Hubbel Incorporated | 5 |
1 |
| Other owners | 0 |