- Sections
- E - Constructions fixes
- E21F - Dispositifs de sécurité, transport, remblayage, sauvetage, ventilation ou drainage dans les mines ou tunnels
- E21F 5/20 - Enlèvement ou abattage de la poussière
Détention brevets de la classe E21F 5/20
Brevets de cette classe: 24
Historique des publications depuis 10 ans
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2
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3
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0
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2
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3
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2
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3
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2
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Propriétaires principaux
| Proprétaire |
Total
|
Cette classe
|
|---|---|---|
| CFT GmbH Compact Filter Technic | 11 |
5 |
| China University of Mining and Technology | 1226 |
3 |
| Royal Industrial Tech Corp. | 9 |
2 |
| Puriscience Pty Ltd | 2 |
2 |
| Anhui University of Science and Technology | 178 |
1 |
| Montall Holdings Pty Ltd | 1 |
1 |
| Rusmar Incorporated | 2 |
1 |
| Shandong University of Science and Technology | 505 |
1 |
| Vermeer Manufacturing Company | 626 |
1 |
| Joy Global Surface Mining Inc | 360 |
1 |
| Joy Global Underground Mining LLC | 346 |
1 |
| Obras Subterraneas, S.A. | 4 |
1 |
| Qingdao University of Technology | 593 |
1 |
| Xuzhou Boan Science & Technology Development Co., Ltd | 11 |
1 |
| PingAn Coal Mining Engineering Research Institute Co. , Ltd | 4 |
1 |
| Guoke Yongji (Beijing) Engineering Installation Co., Ltd. | 1 |
1 |
| Autres propriétaires | 0 |