- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 10/10 - Roller bits with roller axle supported at both ends
Patent holdings for IPC class E21B 10/10
Total number of patents in this class: 25
10-year publication summary
4
|
4
|
2
|
6
|
4
|
1
|
1
|
1
|
0
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Schlumberger Technology Corporation | 9690 |
3 |
Halliburton Energy Services, Inc. | 20165 |
3 |
Sandvik Intellectual Property AB | 1634 |
3 |
Schlumberger Canada Limited | 6913 |
1 |
Schlumberger Technology B.v. | 4951 |
1 |
Smith International, Inc. | 761 |
1 |
Aramco Services Company | 3504 |
1 |
Atlas Copco Secoroc LLC | 19 |
1 |
Chiesi Farmaceutici S.p.A. | 940 |
1 |
Herrenknecht AG | 186 |
1 |
Mhwirth GmbH | 54 |
1 |
Mitsubishi Materials Corporation | 2378 |
1 |
Saudi Arabian Oil Company | 11322 |
1 |
Services Petroliers Schlumberger | 5426 |
1 |
Tu Bergakademie Freiberg | 11 |
1 |
Sandvik Mining and Construction Tools AB | 147 |
1 |
Hole Opener Corporation International | 6 |
1 |
Chengdu Weiyi Petroleum Technology Co., Ltd. | 5 |
1 |
Stu Blattner, Inc. | 1 |
1 |
Other owners | 0 |