Détention brevets de la classe E21B 47/10

Brevets de cette classe: 2678

Historique des publications depuis 10 ans

252
258
254
249
153
130
89
104
87
16
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20538
404
Schlumberger Technology Corporation
10372
241
Saudi Arabian Oil Company
12671
217
Schlumberger Canada Limited
7185
130
Services Petroliers Schlumberger
5663
108
Schlumberger Technology B.v.
5090
104
Baker Hughes Incorporated
5468
75
Schlumberger Holdings Limited
2861
64
Aramco Services Company
3818
57
Prad Research and Development Limited
2696
54
Weatherford Technology Holdings, LLC
2103
34
ExxonMobil Upstream Research Company
2452
33
Landmark Graphics Corporation
1530
29
Baker Hughes, a GE Company, LLC
2123
29
Resman AS
63
27
ConocoPhillips Company
1677
26
Baker Hughes Oilfield Operations, LLC
2164
21
Baker Hughes Holdings LLC
3034
21
Chevron U.S.A. Inc.
3884
20
BP Exploration Operating Company Limited
263
18
Autres propriétaires 966