- Sections
- E - Constructions fixes
- E21F - Dispositifs de sécurité, transport, remblayage, sauvetage, ventilation ou drainage dans les mines ou tunnels
- E21F 15/00 - Procédés ou dispositifs pour mettre en place les matériaux de remblayage dans les travaux du fond
Détention brevets de la classe E21F 15/00
Brevets de cette classe: 182
Historique des publications depuis 10 ans
|
9
|
14
|
18
|
22
|
16
|
13
|
18
|
18
|
12
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Propriétaires principaux
| Proprétaire |
Total
|
Cette classe
|
|---|---|---|
| China University of Mining and Technology | 1316 |
49 |
| Shandong University of Science and Technology | 546 |
6 |
| Strata Products Worldwide, LLC | 68 |
5 |
| Taiyuan University of Technology | 317 |
4 |
| Sinosteel Maanshan General Institute of Mining Research Co., Ltd | 41 |
4 |
| Anhui University of Science and Technology | 199 |
3 |
| Jarala AS | 11 |
3 |
| Shanxi University | 53 |
3 |
| Ccteg Coal Mining Research Institute | 44 |
3 |
| Huawei National Engineering Research Center of High Efficient Recycle and Utilization for Metallic Mineral Resources | 17 |
3 |
| Tiandi (Yulin) Mining Engineering & Technology Co., Ltd | 3 |
3 |
| China University of Mining and Technology, Beijing | 105 |
2 |
| Extrakt Process Solutions LLC | 40 |
2 |
| Gazmick Pty Ltd | 10 |
2 |
| Golder Associates, Inc. | 3 |
2 |
| Heritage Research Group | 19 |
2 |
| Northeastern University | 577 |
2 |
| Shandong University | 1160 |
2 |
| Sturda, Inc. | 4 |
2 |
| Implenia Schweiz AG | 12 |
2 |
| Autres propriétaires | 78 |