Détention brevets de la classe E21B 49/02

Brevets de cette classe: 774

Historique des publications depuis 10 ans

50
59
42
44
63
53
52
47
46
20
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21309
94
Saudi Arabian Oil Company
14305
91
Schlumberger Technology Corporation
11879
76
Schlumberger Canada Limited
7620
39
Services Petroliers Schlumberger
6033
38
Schlumberger Technology B.v.
5299
35
Baker Hughes Incorporated
4905
23
Schlumberger Holdings Limited
2684
14
Prad Research and Development Limited
2652
14
Aramco Services Company
4192
13
Baker Hughes, a GE Company, LLC
2051
13
ConocoPhillips Company
1712
9
Southwest Petroleum University
524
9
Charm Industrial, Inc.
31
9
Chevron U.S.A. Inc.
4159
8
Baker Hughes Oilfield Operations, LLC
2543
8
Longyear TM, Inc.
97
6
PetroChina Company Limited
886
6
ExxonMobil Technology and Engineering Company
1379
6
Boart Longyear Manufacturing and Distribution Inc.
132
6
Autres propriétaires 257