- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining 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: 257
10-year publication summary
|
31
|
16
|
21
|
20
|
21
|
17
|
21
|
6
|
5
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21006 |
26 |
| Baker Hughes Incorporated | 5190 |
24 |
| Boart Longyear Manufacturing and Distribution Inc. | 108 |
18 |
| Longyear TM, Inc. | 100 |
10 |
| Baker Hughes, a GE Company, LLC | 2107 |
10 |
| Schlumberger Technology Corporation | 10994 |
9 |
| Boart Longyear Company | 156 |
9 |
| Smith International, Inc. | 715 |
7 |
| Veracio Ltd. | 65 |
7 |
| Schlumberger Canada Limited | 7410 |
6 |
| Shenzhen University | 1659 |
6 |
| Schlumberger Technology B.v. | 5210 |
5 |
| Saudi Arabian Oil Company | 13569 |
5 |
| Services Petroliers Schlumberger | 5866 |
5 |
| Swick Mining Services Ltd | 13 |
5 |
| Ehwa Diamond Industrial Co., Ltd. | 61 |
4 |
| Flexidrill Limited | 44 |
4 |
| Sandvik Intellectual Property AB | 1460 |
4 |
| Baker Hughes Holdings LLC | 3006 |
4 |
| Coreall AS | 11 |
3 |
| Other owners | 86 |