- 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 10/02 - Core bits
Patent holdings for IPC class E21B 10/02
Total number of patents in this class: 259
10-year publication summary
|
32
|
33
|
19
|
24
|
22
|
23
|
18
|
23
|
6
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Boart Longyear Company | 262 |
32 |
| Halliburton Energy Services, Inc. | 20165 |
26 |
| Baker Hughes Incorporated | 5689 |
25 |
| Longyear TM, Inc. | 139 |
11 |
| Baker Hughes, a GE Company, LLC | 2171 |
10 |
| Schlumberger Technology Corporation | 9690 |
7 |
| Smith International, Inc. | 761 |
7 |
| Flexidrill Limited | 53 |
6 |
| Shenzhen University | 1544 |
6 |
| Schlumberger Canada Limited | 6913 |
5 |
| Swick Mining Services Ltd | 13 |
5 |
| Baker Hughes Holdings LLC | 3060 |
5 |
| Veracio Ltd. | 40 |
5 |
| Schlumberger Technology B.v. | 4951 |
4 |
| Ehwa Diamond Industrial Co., Ltd. | 64 |
4 |
| Sandvik Intellectual Property AB | 1634 |
4 |
| Saudi Arabian Oil Company | 11322 |
4 |
| Services Petroliers Schlumberger | 5426 |
4 |
| Coreall AS | 11 |
3 |
| Diamond Products, Limited | 44 |
3 |
| Other owners | 83 |