- Sections
- E - Constructions fixes
- E21F - Dispositifs de sécurité, transport, remblayage, sauvetage, ventilation ou drainage dans les mines ou tunnels
- E21F 1/10 - Portes d'aérage
Détention brevets de la classe E21F 1/10
Brevets de cette classe: 29
Historique des publications depuis 10 ans
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2
|
3
|
1
|
0
|
2
|
3
|
0
|
1
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Propriétaires principaux
| Proprétaire |
Total
|
Cette classe
|
|---|---|---|
| Jack Kennedy Metal Products & Buildings, Inc. | 33 |
9 |
| American Mine Door Co. | 4 |
4 |
| China University of Mining and Technology, Beijing | 95 |
2 |
| Corky's Management Services Pty Ltd | 2 |
1 |
| Jack Kennedy Metal Products and Buildings, Inc. | 1 |
1 |
| Kennedy Metal Products & Buildings, Inc. | 3 |
1 |
| Qingdao Haier Refrigerator Co., Ltd | 1589 |
1 |
| Rite-Hite Holding Corporation | 660 |
1 |
| The Secretary of State for Defence | 423 |
1 |
| Taiyuan University of Technology | 264 |
1 |
| Zacon Limited | 2 |
1 |
| Qingdao Haier Smart Technology R&D Co., Ltd. | 405 |
1 |
| Haier Smart Home Co., Ltd. | 5518 |
1 |
| Dokuz Eylul Universitesi Rektorlugu | 89 |
1 |
| Biprotec GmbH | 1 |
1 |
| Shanxi Tiandi Coal Mining Machinery Co., Ltd. | 23 |
1 |
| Tai Yuan Research Institute of China Coal Technology & Engineering Group | 5 |
1 |
| Autres propriétaires | 0 |