Détention brevets de la classe E21B 49/10

Brevets de cette classe: 865

Historique des publications depuis 10 ans

50
50
42
31
30
43
38
25
20
9
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Schlumberger Technology Corporation
9690
217
Halliburton Energy Services, Inc.
20165
154
Schlumberger Canada Limited
6913
76
Services Petroliers Schlumberger
5426
65
Schlumberger Technology B.v.
4951
64
Schlumberger Holdings Limited
2947
51
Prad Research and Development Limited
2696
45
Baker Hughes Incorporated
5689
43
Saudi Arabian Oil Company
11322
30
Aramco Services Company
3504
11
Baker Hughes, a GE Company, LLC
2171
10
China Oilfield Services Limited
79
6
Baker Hughes Oilfield Operations, LLC
1885
6
Pietro Fiorentini USA, Inc
8
6
China National Offshore Oil Corporation
86
4
Hydrophilic AS
7
4
Openfield
30
3
Aquaresources SA
3
3
Ben-Gurion University of the Negev Research and Development Authority
228
2
Cameron International Corporation
1305
2
Autres propriétaires 63