Détention brevets de la classe E21B 43/119

Brevets de cette classe: 877

Historique des publications depuis 10 ans

33
35
39
67
65
74
81
61
76
42
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20944
196
DYNAenergetics Europe GmbH
250
64
Schlumberger Technology Corporation
10868
63
Hunting Titan, Inc.
247
54
Schlumberger Canada Limited
7363
35
Saudi Arabian Oil Company
13349
32
Schlumberger Technology B.v.
5187
27
Services Petroliers Schlumberger
5827
27
Wells Fargo Bank, National Association
3935
22
ExxonMobil Upstream Research Company
2395
21
Geodynamics, Inc.
193
21
Dorf Ketal Chemicals FZE
199
18
G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen
70
17
Schlumberger Holdings Limited
2808
12
Baker Hughes Incorporated
5251
12
Owen Oil Tools LP
91
11
Prad Research and Development Limited
2692
11
XConnect, LLC
54
11
GR Energy Services Management, LP
41
9
Baker Hughes Holdings LLC
3001
9
Autres propriétaires 205