Détention brevets de la classe E21B 47/135

Brevets de cette classe: 466

Historique des publications depuis 10 ans

23
26
45
45
78
43
38
33
38
7
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21194
172
Saudi Arabian Oil Company
13949
46
Schlumberger Technology Corporation
11483
30
Baker Hughes Oilfield Operations, LLC
2439
15
Weatherford Technology Holdings, LLC
2065
11
Aramco Services Company
4162
11
BP Exploration Operating Company Limited
261
9
Stone Aerospace, Inc.
27
9
Schlumberger Canada Limited
7553
8
Hifi Engineering Inc.
136
8
Lytt Limited
50
8
Baker Hughes Incorporated
5042
6
Baker Hughes Holdings LLC
2985
6
Chevron U.S.A. Inc.
4081
5
Astro Technology Group, LLC
24
5
Schlumberger Technology B.v.
5268
4
ConocoPhillips Company
1701
4
Services Petroliers Schlumberger
5977
4
Massachusetts Institute of Technology
10196
3
ExxonMobil Upstream Research Company
2337
3
Autres propriétaires 99