Détention brevets de la classe E21B 43/119

Brevets de cette classe: 897

Historique des publications depuis 10 ans

35
39
67
65
74
81
62
77
53
8
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21194
196
DYNAenergetics Europe GmbH
258
69
Schlumberger Technology Corporation
11483
64
Hunting Titan, Inc.
234
53
Schlumberger Canada Limited
7553
35
Saudi Arabian Oil Company
13949
35
Schlumberger Technology B.v.
5268
26
Services Petroliers Schlumberger
5977
26
Geodynamics, Inc.
195
22
Wells Fargo Bank, National Association
4350
22
ExxonMobil Upstream Research Company
2337
21
G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen
77
18
Dorf Ketal Chemicals FZE
202
18
Baker Hughes Incorporated
5042
12
XConnect, LLC
55
12
Schlumberger Holdings Limited
2737
11
Owen Oil Tools LP
77
11
Prad Research and Development Limited
2679
11
GR Energy Services Management, LP
42
9
Baker Hughes Holdings LLC
2985
9
Autres propriétaires 217