- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 27/01 - Machines which completely free the mineral from the seam specially adapted for removing overhanging coal
Patent holdings for IPC class E21C 27/01
Total number of patents in this class: 2
10-year publication summary
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Corporacion Nacional Del Cobre de Chile | 24 |
1 |
| Codelcotec SpA | 12 |
1 |
| Other owners | 0 |