Détention brevets de la classe E21B 47/135

Brevets de cette classe: 478

Historique des publications depuis 10 ans

32
27
47
51
81
45
41
36
40
19
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21320
175
Saudi Arabian Oil Company
14207
46
Schlumberger Technology Corporation
11798
34
Baker Hughes Oilfield Operations, LLC
2521
15
Weatherford Technology Holdings, LLC
2154
11
Aramco Services Company
4188
11
Stone Aerospace, Inc.
28
9
BP Exploration Operating Company Limited
257
8
Hifi Engineering Inc.
138
8
Schlumberger Canada Limited
7606
7
Lytt Limited
45
7
Baker Hughes Incorporated
4940
6
Chevron U.S.A. Inc.
4134
6
Baker Hughes Holdings LLC
3023
6
Astro Technology Group, LLC
24
5
Schlumberger Technology B.v.
5298
4
ConocoPhillips Company
1708
4
Services Petroliers Schlumberger
6024
4
Massachusetts Institute of Technology
10239
3
ExxonMobil Upstream Research Company
2306
3
Autres propriétaires 106