Détention brevets de la classe E21B 43/119

Brevets de cette classe: 842

Historique des publications depuis 10 ans

40
42
45
78
75
82
94
65
73
17
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20538
189
DYNAenergetics Europe GmbH
230
59
Schlumberger Technology Corporation
10372
56
Hunting Titan, Inc.
247
52
Schlumberger Canada Limited
7185
30
Saudi Arabian Oil Company
12671
30
Schlumberger Technology B.v.
5090
25
Services Petroliers Schlumberger
5663
25
Geodynamics, Inc.
199
22
Wells Fargo Bank, National Association
3649
22
ExxonMobil Upstream Research Company
2452
21
G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen
68
16
Dorf Ketal Chemicals FZE
240
16
Baker Hughes Incorporated
5468
13
Owen Oil Tools LP
94
13
Schlumberger Holdings Limited
2861
12
Prad Research and Development Limited
2696
11
XConnect, LLC
45
10
GR Energy Services Management, LP
42
9
Baker Hughes Holdings LLC
3034
9
Autres propriétaires 202