Détention brevets de la classe E21B 47/10

Brevets de cette classe: 2679

Historique des publications depuis 10 ans

252
258
254
249
153
130
89
108
90
30
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20618
410
Schlumberger Technology Corporation
10487
245
Saudi Arabian Oil Company
12609
213
Schlumberger Canada Limited
7134
134
Services Petroliers Schlumberger
5698
111
Schlumberger Technology B.v.
5113
107
Baker Hughes Incorporated
5325
74
Schlumberger Holdings Limited
2853
64
Aramco Services Company
3852
58
Prad Research and Development Limited
2696
54
Weatherford Technology Holdings, LLC
2006
32
ExxonMobil Upstream Research Company
2415
32
Landmark Graphics Corporation
1520
29
Baker Hughes, a GE Company, LLC
2115
29
Resman AS
63
27
ConocoPhillips Company
1668
26
Chevron U.S.A. Inc.
3901
21
Baker Hughes Oilfield Operations, LLC
2192
21
Baker Hughes Holdings LLC
3023
21
BP Exploration Operating Company Limited
260
17
Autres propriétaires 954