Détention brevets de la classe E21B 49/08

Brevets de cette classe: 4404

Historique des publications depuis 10 ans

314
340
233
258
276
227
253
225
216
114
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
21299
923
Schlumberger Technology Corporation
11961
651
Saudi Arabian Oil Company
14390
369
Schlumberger Canada Limited
7616
280
Services Petroliers Schlumberger
6024
258
Schlumberger Technology B.v.
5289
246
Schlumberger Holdings Limited
2660
131
Prad Research and Development Limited
2642
131
Baker Hughes Incorporated
4870
126
Baker Hughes Oilfield Operations, LLC
2555
76
Baker Hughes, a GE Company, LLC
2022
67
Aramco Services Company
4191
59
ConocoPhillips Company
1717
40
Landmark Graphics Corporation
1489
35
Chevron U.S.A. Inc.
4175
27
ExxonMobil Upstream Research Company
2284
27
Weatherford Technology Holdings, LLC
2167
19
Southwest Petroleum University
530
16
Equinor Energy AS
499
14
Resman Technology AS
44
14
Autres propriétaires 895