- 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: 66
10-year publication summary
|
17
|
5
|
12
|
10
|
2
|
4
|
3
|
2
|
2
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Surface Mining Inc | 356 |
45 |
| Sandvik Mining and Construction Oy | 703 |
4 |
| Caterpillar Global Mining LLC | 199 |
3 |
| MineSense Technologies Ltd. | 58 |
3 |
| Kennametal Inc. | 1380 |
2 |
| Optima Mining Systems Pty Ltd | 2 |
2 |
| Komatsu Ltd. | 4265 |
1 |
| Atlas Copco Rock Drills AB | 177 |
1 |
| CNC Industries Ltd. | 4 |
1 |
| Hazemag & EPR GmbH | 14 |
1 |
| Projet International inc. | 4 |
1 |
| Teck Resources Limited | 50 |
1 |
| Epiroc Rock Drills Aktiebolag | 405 |
1 |
| Other owners | 0 |