- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 29/14 - Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains by haulage cable or chain pulling the machine along the working face
Patent holdings for IPC class E21C 29/14
Total number of patents in this class: 13
10-year publication summary
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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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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
|
|---|---|---|
| Bucyrus Europe GmbH | 32 |
4 |
| Caterpillar Inc. | 10299 |
3 |
| Caterpillar Global Mining Europe GmbH | 85 |
2 |
| Shell Internationale Research Maatschappij B.V. | 3391 |
1 |
| Thiele GmbH & Co. KG | 85 |
1 |
| Joy Global Surface Mining Inc | 373 |
1 |
| Kopex Machinery Spółka Akcyjna | 4 |
1 |
| Other owners | 0 |