Détention brevets de la classe E21B 47/12

Brevets de cette classe: 6199

Historique des publications depuis 10 ans

526
495
463
395
304
335
230
258
218
183
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21021
1419
Schlumberger Technology Corporation
11023
562
Schlumberger Canada Limited
7418
395
Services Petroliers Schlumberger
5874
346
Schlumberger Technology B.v.
5217
289
Saudi Arabian Oil Company
13622
286
Baker Hughes Incorporated
5179
251
Baker Hughes, a GE Company, LLC
2107
147
Schlumberger Holdings Limited
2791
126
Prad Research and Development Limited
2687
119
Baker Hughes Oilfield Operations, LLC
2380
112
Weatherford Technology Holdings, LLC
2034
95
Evolution Engineering Inc.
300
92
Landmark Graphics Corporation
1517
76
Geoquest Systems B.V.
793
53
Aramco Services Company
4090
51
Expro North Sea Limited
233
46
Baker Hughes Holdings LLC
3005
46
Metrol Technology Limited
85
43
ExxonMobil Upstream Research Company
2380
42
Autres propriétaires 1603