- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 27/46 - Mineral freed by means not involving slitting by percussed planing means
Patent holdings for IPC class E21C 27/46
Total number of patents in this class: 2
10-year publication summary
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Optima Mining Systems Pty Ltd | 3 |
2 |
| Other owners | 0 |