Détention brevets de la classe E21F 7/00

Brevets de cette classe: 157

Historique des publications depuis 10 ans

13
16
25
13
8
10
7
12
7
4
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
China University of Mining and Technology
1308
53
Shandong University of Science and Technology
545
11
Anhui University of Science and Technology
197
7
Elkins Earthworks, LLC
14
5
HeNan Polytechnic University
102
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
1654
3
ENI S.p.A.
1307
3
JIANGSU XINCHUANG SAFETY TECHNOLOGY RESEARCH INSTITUTE CO., Ltd.
5
3
China University of Mining and Technology, Beijing
107
2
China University of Petroleum (East China)
417
2
Solvay Chemicals, Inc.
19
2
Xi'an Jiaotong University
735
2
Wuhan Institute of Technology
56
2
CECEP Ningxia New Energy Resources Joint Stock Co., Ltd.
2
2
Ping 'an Coal Mine Gas Control National Engineering Research Center Co., Ltd.
10
2
Ccteg Chongqing Research Institute
22
2
Autres propriétaires 35