- Sections
- E - Constructions fixes
- E21F - Dispositifs de sécurité, transport, remblayage, sauvetage, ventilation ou drainage dans les mines ou tunnels
- E21F 16/00 - Drainage
Détention brevets de la classe E21F 16/00
Brevets de cette classe: 28
Historique des publications depuis 10 ans
4
|
3
|
3
|
0
|
5
|
1
|
2
|
2
|
7
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Propriétaires principaux
Proprétaire |
Total
|
Cette classe
|
---|---|---|
China University of Mining and Technology | 1189 |
7 |
China Shenhua Energy Company Limited | 24 |
2 |
China University of Mining & Technology (Beijing) | 42 |
2 |
Sturda, Inc. | 4 |
2 |
Weir Minerals Australia, Ltd. | 309 |
2 |
China University of Mining and Technology, Beijing | 66 |
1 |
Floodbreak, L.L.C. | 34 |
1 |
Giertsen Tunnel AS | 1 |
1 |
Shandong University of Science and Technology | 459 |
1 |
Taiyuan University of Technology | 212 |
1 |
WSP Global Inc. | 32 |
1 |
Genesis Alkali Wyoming, LP | 18 |
1 |
HeNan Polytechnic University | 81 |
1 |
Jiangsu Vocational Institute of Architectural Technology | 8 |
1 |
Wanbao Mining Ltd. | 6 |
1 |
China Railway 18 Bureau Group Co., Ltd. | 9 |
1 |
China Petroleum & Chemical Corporation Ltd Gas Storage Branch | 1 |
1 |
State Energy Investment Group Co. LTD | 1 |
1 |
Autres propriétaires | 0 |