Détention brevets de la classe E21B 47/113

Brevets de cette classe: 188

Historique des publications depuis 10 ans

5
13
17
11
24
24
19
15
13
0
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21107
47
Saudi Arabian Oil Company
13839
34
Schlumberger Technology Corporation
11266
10
Aramco Services Company
4154
7
Lytt Limited
51
6
Nike, Inc.
14506
5
California Institute of Technology
4007
5
Hifi Engineering Inc.
136
5
Schlumberger Canada Limited
7487
4
Chevron U.S.A. Inc.
4040
4
Baker Hughes Oilfield Operations, LLC
2402
4
Schlumberger Technology B.v.
5242
3
ConocoPhillips Company
1699
3
Kemira Oyj
1232
3
Services Petroliers Schlumberger
5921
3
Weatherford Technology Holdings, LLC
2032
2
Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
823
2
China Petroleum & Chemical Corporation
1995
2
ExxonMobil Upstream Research Company
2359
2
Kemira Chemicals, Inc.
78
2
Autres propriétaires 35