- 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: 76
10-year publication summary
|
2
|
1
|
2
|
2
|
5
|
4
|
8
|
8
|
9
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Luossavaara-Kiirunavaara AB | 117 |
5 |
| Technological Resources Pty. Limited | 458 |
5 |
| Newcrest Mining Limited | 38 |
5 |
| Komatsu Ltd. | 4601 |
4 |
| Anhui University of Science and Technology | 188 |
3 |
| The Mosaic Company | 213 |
3 |
| Caveman Consulting Pty Ltd | 3 |
3 |
| Corporacion Nacional Del Cobre de Chile | 28 |
2 |
| Extrakt Process Solutions LLC | 36 |
2 |
| Kyushu University, National University Corporation | 1661 |
2 |
| MineSense Technologies Ltd. | 63 |
2 |
| Nordic Minesteel Technologies Inc. | 36 |
2 |
| Northeastern University | 543 |
2 |
| Rocmec International Inc. | 3 |
2 |
| Sumitomo Metal Mining Co., Ltd. | 1795 |
2 |
| Vale S.A. | 273 |
2 |
| Orica International Pte Ltd | 184 |
2 |
| Obschestvo S Ogranichennoi Otvetstvennostyu "uralskaya Geotekhnologicheskaya Kompaniya" | 2 |
2 |
| Baker Hughes Incorporated | 5246 |
1 |
| Massachusetts Institute of Technology | 10115 |
1 |
| Other owners | 24 |