Détention brevets de la classe E21B 43/119

Brevets de cette classe: 889

Historique des publications depuis 10 ans

35
39
67
65
74
81
61
77
53
3
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21117
196
DYNAenergetics Europe GmbH
258
69
Schlumberger Technology Corporation
11238
63
Hunting Titan, Inc.
242
53
Saudi Arabian Oil Company
13814
35
Schlumberger Canada Limited
7485
34
Schlumberger Technology B.v.
5239
26
Services Petroliers Schlumberger
5916
26
Geodynamics, Inc.
195
22
Wells Fargo Bank, National Association
4194
22
ExxonMobil Upstream Research Company
2364
21
G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen
76
18
Dorf Ketal Chemicals FZE
200
18
Baker Hughes Incorporated
5140
12
XConnect, LLC
55
12
Schlumberger Holdings Limited
2757
11
Owen Oil Tools LP
83
11
Prad Research and Development Limited
2686
11
GR Energy Services Management, LP
41
9
Baker Hughes Holdings LLC
2991
9
Autres propriétaires 211