Détention brevets de la classe E21B 49/00

Brevets de cette classe: 4790

Historique des publications depuis 10 ans

344
380
417
425
382
445
489
340
300
85
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
863
Schlumberger Technology Corporation
9690
513
Saudi Arabian Oil Company
11322
512
Schlumberger Canada Limited
6913
204
Services Petroliers Schlumberger
5426
165
Schlumberger Technology B.v.
4951
138
Landmark Graphics Corporation
1526
131
Baker Hughes Incorporated
5689
110
Aramco Services Company
3504
106
Baker Hughes, a GE Company, LLC
2171
92
Schlumberger Holdings Limited
2947
88
Prad Research and Development Limited
2696
86
ConocoPhillips Company
1657
78
Chevron U.S.A. Inc.
3774
75
ExxonMobil Upstream Research Company
2525
52
Baker Hughes Oilfield Operations, LLC
1885
48
Southwest Petroleum University
403
42
Baker Hughes Holdings LLC
3060
34
Equinor Energy AS
475
29
PetroChina Company Limited
462
27
Autres propriétaires 1397