- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 15/59 - Devices for setting props for hydraulic, pneumatic, or hydraulic-pneumatic props
Patent holdings for IPC class E21D 15/59
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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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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0
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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
|
|---|---|---|
| China University of Mining and Technology | 1313 |
2 |
| Other owners | 0 |