- Sections
- E - Constructions fixes
- E21F - Dispositifs de sécurité, transport, remblayage, sauvetage, ventilation ou drainage dans les mines ou tunnels
- E21F 17/18 - Adaptations particulières des dispositifs de signalisation ou d'alarme
Détention brevets de la classe E21F 17/18
Brevets de cette classe: 382
Historique des publications depuis 10 ans
|
13
|
14
|
13
|
36
|
34
|
24
|
34
|
40
|
26
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Propriétaires principaux
| Proprétaire |
Total
|
Cette classe
|
|---|---|---|
| China University of Mining and Technology | 1289 |
43 |
| Shandong University of Science and Technology | 537 |
18 |
| Joy Global Underground Mining LLC | 348 |
15 |
| Sandvik Mining and Construction Oy | 864 |
11 |
| Caterpillar Inc. | 10051 |
5 |
| Shenzhen University | 1691 |
5 |
| Caterpillar Global Mining Europe GmbH | 85 |
4 |
| Anhui University of Science and Technology | 190 |
4 |
| Innovative Mining Products (Pty) Ltd, TA New Concept Mining | 33 |
4 |
| University of Science and Technology Beijing | 300 |
4 |
| HeNan Polytechnic University | 102 |
4 |
| China Railway Tunnel Group Co., Ltd | 24 |
4 |
| Shanxi Tiandi Coal Mining Machinery Co., Ltd. | 25 |
4 |
| Komatsu Ltd. | 4659 |
3 |
| Central South University | 468 |
3 |
| NCM Innovations (Pty) Ltd | 35 |
3 |
| Newtrax Technologies Inc. | 13 |
3 |
| Shandong Energy Group Co., Ltd. | 8 |
3 |
| Shandong University | 1109 |
3 |
| Institute of Rock and Soil Mechanics, Chinese Academy of Sciences | 80 |
3 |
| Autres propriétaires | 236 |