- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 41/22 - Methods of underground miningLayouts therefor for ores, e.g. mining placers
Patent holdings for IPC class E21C 41/22
Total number of patents in this class: 83
10-year publication summary
|
2
|
3
|
2
|
6
|
6
|
8
|
9
|
8
|
10
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Luossavaara-Kiirunavaara AB | 131 |
5 |
| Newcrest Mining Limited | 37 |
5 |
| Komatsu Ltd. | 4741 |
4 |
| Technological Resources Pty. Limited | 442 |
4 |
| Anhui University of Science and Technology | 199 |
3 |
| Caveman Consulting Pty Ltd | 3 |
3 |
| Corporacion Nacional Del Cobre de Chile | 24 |
2 |
| Extrakt Process Solutions LLC | 40 |
2 |
| Guangzhou Institute of Geochemistry, Chinese Academy of Sciences | 21 |
2 |
| Kyushu University, National University Corporation | 1725 |
2 |
| MineSense Technologies Ltd. | 63 |
2 |
| The Mosaic Company | 235 |
2 |
| Nordic Minesteel Technologies Inc. | 39 |
2 |
| Northeastern University | 574 |
2 |
| Rocmec International Inc. | 3 |
2 |
| Sumitomo Metal Mining Co., Ltd. | 1981 |
2 |
| Vale S.A. | 262 |
2 |
| Obschestvo S Ogranichennoi Otvetstvennostyu "uralskaya Geotekhnologicheskaya Kompaniya" | 2 |
2 |
| Hay Innovations and Technology Pty Ltd | 2 |
2 |
| Baker Hughes Incorporated | 4922 |
1 |
| Other owners | 32 |