- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 27/12 - Machines which completely free the mineral from the seam by both slitting and breaking-down breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools
Patent holdings for IPC class E21C 27/12
Total number of patents in this class: 29
10-year publication summary
|
3
|
9
|
6
|
1
|
2
|
2
|
0
|
1
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Underground Mining LLC | 344 |
10 |
| Sandvik Intellectual Property AB | 1388 |
6 |
| Furukawa Rock Drill Co., Ltd. | 39 |
3 |
| Sandvik Mining and Construction G.m.b.H. | 93 |
3 |
| Element Six (UK) Limited | 236 |
3 |
| Atlas Copco Craelius AB | 11 |
1 |
| CMTE Development Limited | 37 |
1 |
| Joy MM Delaware, Inc. | 56 |
1 |
| Gainwell Engineering Global Pte. Ltd. | 11 |
1 |
| Other owners | 0 |