- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 31/10 - Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for slewing parts of the machines
Patent holdings for IPC class E21C 31/10
Total number of patents in this class: 9
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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1
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1
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1
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1
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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
|
|---|---|---|
| Joy Global Underground Mining LLC | 349 |
3 |
| Optima Mining Systems Pty Ltd | 3 |
2 |
| The Charles Machine Works, Inc. | 407 |
1 |
| Sany Heavy Equipment Co., Ltd. | 77 |
1 |
| Sany Heavy Integrated Coal Minging Equipment Co., Ltd | 12 |
1 |
| Yimin Zhang | 2 |
1 |
| Other owners | 0 |