Détention brevets de la classe E21B 47/135

Brevets de cette classe: 459

Historique des publications depuis 10 ans

23
26
45
45
77
43
38
31
38
2
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21098
171
Saudi Arabian Oil Company
13857
45
Schlumberger Technology Corporation
11274
29
Baker Hughes Oilfield Operations, LLC
2405
15
Weatherford Technology Holdings, LLC
2033
11
Aramco Services Company
4157
11
Stone Aerospace, Inc.
27
9
Schlumberger Canada Limited
7487
8
BP Exploration Operating Company Limited
260
8
Hifi Engineering Inc.
136
8
Lytt Limited
51
8
Baker Hughes Incorporated
5109
6
Baker Hughes Holdings LLC
2986
6
Chevron U.S.A. Inc.
4048
5
Astro Technology Group, LLC
24
5
Schlumberger Technology B.v.
5245
4
ConocoPhillips Company
1698
4
Services Petroliers Schlumberger
5923
4
Massachusetts Institute of Technology
10172
3
ExxonMobil Upstream Research Company
2358
3
Autres propriétaires 96