- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 17/04 - Distributing means for power supply
Patent holdings for IPC class E21F 17/04
Total number of patents in this class: 11
10-year publication summary
|
1
|
0
|
1
|
1
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0
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0
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0
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0
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2
|
1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Epiroc Rock Drills Aktiebolag | 614 |
2 |
| First Quantum Minerals Ltd | 22 |
2 |
| Caterpillar Global Mining Europe GmbH | 85 |
1 |
| ACT (Europe) Ltd. | 1 |
1 |
| Cobraco IP Pty Limited | 2 |
1 |
| Evapco, Inc. | 303 |
1 |
| Howden Alphair Ventilating Systems Inc. | 5 |
1 |
| RAG Aktiengesellschaft | 30 |
1 |
| Master Drilling (Pty) Limited | 2 |
1 |
| Other owners | 0 |