Détention brevets de la classe E21B 47/10

Brevets de cette classe: 2753

Historique des publications depuis 10 ans

228
232
229
227
136
111
74
96
88
67
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20944
415
Schlumberger Technology Corporation
10868
259
Saudi Arabian Oil Company
13349
218
Schlumberger Canada Limited
7363
148
Services Petroliers Schlumberger
5827
123
Schlumberger Technology B.v.
5187
116
Baker Hughes Incorporated
5251
74
Schlumberger Holdings Limited
2808
64
Aramco Services Company
4023
59
Prad Research and Development Limited
2692
54
ExxonMobil Upstream Research Company
2395
33
Weatherford Technology Holdings, LLC
2029
32
Landmark Graphics Corporation
1523
30
Baker Hughes, a GE Company, LLC
2111
29
ConocoPhillips Company
1675
27
Resman AS
75
27
Baker Hughes Oilfield Operations, LLC
2320
23
Chevron U.S.A. Inc.
3984
22
Baker Hughes Holdings LLC
3001
18
BP Exploration Operating Company Limited
270
17
Autres propriétaires 965