- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 27/30 - Mineral freed by means not involving slitting by jaws, buckets, or scoops that scoop-out the mineral
Patent holdings for IPC class E21C 27/30
Total number of patents in this class: 70
10-year publication summary
|
6
|
7
|
1
|
4
|
2
|
2
|
2
|
2
|
3
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Surface Mining Inc | 371 |
46 |
| Caterpillar Global Mining LLC | 204 |
4 |
| MineSense Technologies Ltd. | 63 |
4 |
| Sandvik Mining and Construction Oy | 857 |
4 |
| Kennametal Inc. | 1362 |
2 |
| Optima Mining Systems Pty Ltd | 3 |
2 |
| Komatsu Ltd. | 4662 |
1 |
| Atlas Copco Rock Drills AB | 128 |
1 |
| CNC Industries Ltd. | 9 |
1 |
| Hazemag & EPR GmbH | 24 |
1 |
| Motion Metrics International Corp | 68 |
1 |
| Teck Resources Limited | 53 |
1 |
| Epiroc Rock Drills Aktiebolag | 614 |
1 |
| Joy Global Surface Mining Inc | 1 |
1 |
| Other owners | 0 |