- Sections
- E - Constructions fixes
- E21D - Puitstunnelsgaleriesvastes chambres souterraines
- E21D 5/12 - Accessoires pour faire les revêtements de puits, p. ex. plates-formes suspendues, coffrages
Détention brevets de la classe E21D 5/12
Brevets de cette classe: 32
Historique des publications depuis 10 ans
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2
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1
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0
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1
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3
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2
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3
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1
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1
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2
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Propriétaires principaux
| Proprétaire |
Total
|
Cette classe
|
|---|---|---|
| Redpath Deilmann GmbH | 11 |
3 |
| Schlumberger Technology Corporation | 11054 |
1 |
| Schlumberger Canada Limited | 7432 |
1 |
| Schlumberger Technology B.v. | 5223 |
1 |
| Schlumberger Holdings Limited | 2790 |
1 |
| Bergteamet AB | 10 |
1 |
| China Railway Engineering Equipment Group Co., Ltd. | 46 |
1 |
| China University of Mining and Technology | 1275 |
1 |
| Prad Research and Development Limited | 2687 |
1 |
| Services Petroliers Schlumberger | 5884 |
1 |
| Technological Resources Pty. Limited | 451 |
1 |
| Tensar Corporation | 8 |
1 |
| University of Science and Technology Beijing | 293 |
1 |
| China Coal Research Institute | 20 |
1 |
| China Railway No. 8 Engineering Group Co., Ltd. | 9 |
1 |
| China Railway No.8 Engineering Group Co., Ltd. | 7 |
1 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "skuratovskiy Opytno-experimental'nyy Zavod" | 1 |
1 |
| Slipform Engineering Ltd | 2 |
1 |
| Xi'an University of Science and Technology | 12 |
1 |
| China Railway 18 Bureau Group Co., Ltd. | 9 |
1 |
| Autres propriétaires | 10 |