- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 15/08 - Filling-up hydraulically or pneumatically
Patent holdings for IPC class E21F 15/08
Total number of patents in this class: 22
10-year publication summary
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0
|
2
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0
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4
|
5
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2
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2
|
3
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3
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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
|
|---|---|---|
| Strata Products Worldwide, LLC | 66 |
5 |
| Shandong University of Science and Technology | 499 |
3 |
| China University of Mining and Technology | 1224 |
2 |
| ABC Canada Technology Group Ltd. | 22 |
1 |
| Anhui University of Science and Technology | 178 |
1 |
| Golder Associates, Inc. | 6 |
1 |
| Jiangsu New Century Jiangnan Environmental Protection Co., Ltd. | 3 |
1 |
| Lafarge Canada Inc. | 62 |
1 |
| MTI Group Pty Ltd | 36 |
1 |
| Outotec (Finland) Oy | 489 |
1 |
| Sturda, Inc. | 4 |
1 |
| Tagfilm Pty Limited | 2 |
1 |
| Quattro Project Engineering Pty Ltd | 1 |
1 |
| Hinfra S.r.l. | 3 |
1 |
| Jayant Chandulal Mehta | 1 |
1 |
| Other owners | 0 |