Détention brevets de la classe E21D 23/04

Brevets de cette classe: 90

Historique des publications depuis 10 ans

8
7
3
9
1
3
11
8
7
0
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
China University of Mining and Technology
1284
15
Anhui University of Science and Technology
190
6
Shandong University of Science and Technology
538
6
Joy Global Underground Mining LLC
349
6
Caterpillar Inc.
9998
4
Caterpillar Global Mining Europe GmbH
85
3
Bucyrus Europe GmbH
32
3
Swanson Industries, Inc.
12
3
Tiefenbach Control Systems GmbH
18
2
Xuzhou Goldfluid Hydraulic Technology Development Co., Ltd.
18
2
Manchao He
4
2
Jiangsu Vocational Institute of Architectural Technology
10
2
China Mining & Civil New Material Science and Technology Ltd.
11
2
Shanxi Tiandi Coal Mining Machinery Co., Ltd.
25
2
Ccteg Coal Mining Research Institute
42
2
Ccteg Chinese Institute of Coal Science
6
2
Ccteg Taiyuan Research Institute
9
2
Ccteg Tiandi Science & Technology Co., Ltd.
10
2
Wangzhuang Coal Mine of Shanxi Lu'an Environmental Protection Energy Development Co., Ltd.
2
2
China University of Mining and Technology, Beijing
102
1
Autres propriétaires 21