Détention brevets de la classe E21B 47/135

Brevets de cette classe: 331

Historique des publications depuis 10 ans

21
12
9
32
26
44
45
72
37
1
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
19705
138
Saudi Arabian Oil Company
9755
22
Schlumberger Technology Corporation
9179
19
BP Exploration Operating Company Limited
290
10
Stone Aerospace, Inc.
28
9
Schlumberger Canada Limited
6561
8
Baker Hughes Oilfield Operations, LLC
1424
8
Lytt Limited
38
8
Weatherford Technology Holdings, LLC
2386
7
Baker Hughes Incorporated
6417
6
Aramco Services Company
3283
6
Baker Hughes Holdings LLC
2617
6
Chevron U.S.A. Inc.
3575
5
Hifi Engineering Inc.
111
5
Schlumberger Technology B.v.
4750
4
Services Petroliers Schlumberger
5150
4
AFL Telecommunications LLC
618
3
ExxonMobil Upstream Research Company
2791
3
Baker Hughes, a GE Company, LLC
2732
3
Shell USA, Inc.
928
3
Autres propriétaires 54