- Sections
- E - Constructions fixes
- E21D - Puitstunnelsgaleriesvastes chambres souterraines
- E21D 15/44 - Étançons hydrauliques, pneumatiques ou hydropneumatiques
Détention brevets de la classe E21D 15/44
Brevets de cette classe: 64
Historique des publications depuis 10 ans
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3
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4
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0
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2
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4
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5
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5
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4
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1
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4
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Propriétaires principaux
| Proprétaire |
Total
|
Cette classe
|
|---|---|---|
| Shandong University of Science and Technology | 524 |
9 |
| China University of Mining and Technology | 1256 |
4 |
| Caterpillar Inc. | 9558 |
2 |
| Caterpillar Global Mining Europe GmbH | 85 |
2 |
| MMC Innovations LLP | 4 |
2 |
| China Communications Construction Company Limited | 14 |
2 |
| Hebei Feipu Environmental Protection Technology Co. Ltd | 5 |
2 |
| Qingdao First Municipal Engineering Co., Ltd | 4 |
2 |
| Qingdao West Coast Rail Transit Co., Ltd | 5 |
2 |
| Ccteg Coal Mining Research Institute | 40 |
2 |
| FCI Holdings Delaware, LLC | 86 |
2 |
| Raytheon Company | 8387 |
1 |
| Bochumer Eisenhütte Heintzmann GmbH & Co. KG | 12 |
1 |
| Bucyrus Europe GmbH | 32 |
1 |
| Burrell Mining Products, Inc. | 5 |
1 |
| B.V. Holmatro Industrial Equipment | 3 |
1 |
| Changshu Tongrun Auto Accessory Co., Ltd. | 41 |
1 |
| Cougar Can Company Pty Ltd. | 3 |
1 |
| Givens Engineering Inc. | 5 |
1 |
| J.W.F. Technologies LLC. | 3 |
1 |
| Autres propriétaires | 24 |