Détention brevets de la classe E21B 43/28

Brevets de cette classe: 275

Historique des publications depuis 10 ans

32
30
18
22
20
30
20
19
17
9
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024

Propriétaires principaux

Proprétaire
Total
Cette classe
Halliburton Energy Services, Inc.
20165
29
Dorf Ketal Chemicals FZE
238
10
Saudi Arabian Oil Company
11322
9
Baker Hughes Holdings LLC
3060
9
The Mosaic Company
165
8
Schlumberger Technology Corporation
9690
7
ExxonMobil Upstream Research Company
2525
7
Sesqui Mining, LLC
7
6
101061615 Saskatchewan Ltd.
5
5
Differential Engineering Inc.
10
5
Freeport Minerals Corporation
80
5
Solvay SA
1181
5
Flex-Chem Holding Company, LLC
32
4
Solvay Chemicals, Inc.
24
4
Welltec AS
301
4
Maersk Olie og Gas AS
103
4
102062448 Saskatchewan Ltd.
7
4
Baker Hughes Incorporated
5689
3
Weatherford Technology Holdings, LLC
2135
3
Aramco Services Company
3504
3
Autres propriétaires 141