- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 9/00 - Devices preventing sparking of machines or apparatus
Patent holdings for IPC class E21F 9/00
Total number of patents in this class: 8
10-year publication summary
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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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1
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1
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0
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1
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Intellectual Property AB | 1479 |
2 |
| Caterpillar Inc. | 9594 |
1 |
| Caterpillar Global Mining Europe GmbH | 85 |
1 |
| CMTE Development Limited | 39 |
1 |
| Phoenix Conveyor Belt Systems GmbH | 21 |
1 |
| Anglo American Metallurgical Coal Pty Ltd | 2 |
1 |
| Anglo American Steelmaking Coal Pty Ltd | 2 |
1 |
| Other owners | 0 |