Détention brevets de la classe E21F 7/00

Brevets de cette classe: 158

Historique des publications depuis 10 ans

8
13
16
25
13
8
10
7
12
7
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
China University of Mining and Technology
1269
53
Shandong University of Science and Technology
534
11
Anhui University of Science and Technology
189
7
Elkins Earthworks, LLC
14
5
HeNan Polytechnic University
101
5
Xuzhou Boan Science & Technology Development Co., Ltd
11
4
Xuzhou Olivine Geoscience & Geotech Co., Ltd
12
4
China Overseas Construction Limited
5
4
China State Construction International Engineering Company Limited
5
4
Commonwealth Scientific and Industrial Research Organisation
1667
3
ENI S.p.A.
1276
3
JIANGSU XINCHUANG SAFETY TECHNOLOGY RESEARCH INSTITUTE CO., Ltd.
5
3
China University of Mining and Technology, Beijing
95
2
China University of Petroleum (East China)
386
2
Solvay Chemicals, Inc.
19
2
Xi'an Jiaotong University
671
2
Wuhan Institute of Technology
54
2
CECEP Ningxia New Energy Resources Joint Stock Co., Ltd.
2
2
Ping 'an Coal Mine Gas Control National Engineering Research Center Co., Ltd.
8
2
Ccteg Chongqing Research Institute
15
2
Autres propriétaires 36