- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 17/10 - Details of mine caps for engaging the tops of pit-props, with or without retaining-platesRetaining-plates
Patent holdings for IPC class E21D 17/10
Total number of patents in this class: 2
10-year publication summary
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0
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0
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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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0
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| China University of Mining and Technology | 1268 |
1 |
| Xuzhou Cumt Backfill Technology Co., Ltd. | 6 |
1 |
| Other owners | 0 |