- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 13/04 - Transport specially adapted to underground conditions in gravity inclinesTransport specially adapted to underground conditions in staple or inclined shafts
Patent holdings for IPC class E21F 13/04
Total number of patents in this class: 45
10-year publication summary
|
5
|
2
|
3
|
1
|
2
|
3
|
5
|
2
|
2
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nordic Minesteel Technologies Inc. | 36 |
6 |
| RAG Aktiengesellschaft | 31 |
3 |
| Weir Minerals Netherlands B.V. | 60 |
3 |
| Corporacion Nacional Del Cobre de Chile | 28 |
2 |
| J.S. Redpath Limited | 3 |
2 |
| Torex Gold Resources Inc. | 6 |
2 |
| FLSmidth A/S | 773 |
2 |
| Redpath Canada Limited | 13 |
2 |
| RIINO Inc. | 8 |
2 |
| Cementation Canada Inc. | 9 |
1 |
| China University of Mining and Technology | 1265 |
1 |
| GHD Pty Ltd | 12 |
1 |
| Instituto de Innovacion en Mineria y Metalurgia | 1 |
1 |
| Maestranza Mining Parts Ltda. | 2 |
1 |
| Prairie Machine & Parts Mfg. - Partnership | 37 |
1 |
| Shandong University of Science and Technology | 527 |
1 |
| Siemag Tecberg GmbH | 58 |
1 |
| Stantec Consulting Ltd. | 23 |
1 |
| ThyssenKrupp AG | 3308 |
1 |
| ThyssenKrupp Industrial Solutions AG | 632 |
1 |
| Other owners | 10 |