Détention brevets de la classe E21B 47/10

Brevets de cette classe: 2747

Historique des publications depuis 10 ans

228
232
229
227
136
111
74
96
88
62
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20911
414
Schlumberger Technology Corporation
10780
258
Saudi Arabian Oil Company
13224
216
Schlumberger Canada Limited
7332
148
Services Petroliers Schlumberger
5803
123
Schlumberger Technology B.v.
5176
116
Baker Hughes Incorporated
5274
74
Schlumberger Holdings Limited
2817
64
Aramco Services Company
3987
58
Prad Research and Development Limited
2693
54
ExxonMobil Upstream Research Company
2396
33
Weatherford Technology Holdings, LLC
2023
32
Landmark Graphics Corporation
1527
30
Baker Hughes, a GE Company, LLC
2110
29
ConocoPhillips Company
1675
27
Resman AS
74
27
Baker Hughes Oilfield Operations, LLC
2302
23
Chevron U.S.A. Inc.
3967
22
Baker Hughes Holdings LLC
3007
18
BP Exploration Operating Company Limited
270
17
Autres propriétaires 964