Détention brevets de la classe E21B 49/10

Brevets de cette classe: 888

Historique des publications depuis 10 ans

42
31
30
43
38
25
22
27
27
14
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Schlumberger Technology Corporation
11879
213
Halliburton Energy Services, Inc.
21309
183
Schlumberger Canada Limited
7620
76
Schlumberger Technology B.v.
5299
67
Services Petroliers Schlumberger
6033
67
Schlumberger Holdings Limited
2684
46
Prad Research and Development Limited
2652
44
Baker Hughes Incorporated
4905
37
Saudi Arabian Oil Company
14305
33
Aramco Services Company
4192
11
Baker Hughes, a GE Company, LLC
2051
10
Baker Hughes Oilfield Operations, LLC
2543
9
China Oilfield Services Limited
96
6
Pietro Fiorentini USA, Inc
8
6
China National Offshore Oil Corporation
96
4
Hydrophilic AS
9
4
Openfield
31
3
Aquaresources SA
3
3
Landmark Graphics Corporation
1502
2
Weatherford Technology Holdings, LLC
2162
2
Autres propriétaires 62