- 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: 259
10-year publication summary
|
19
|
24
|
22
|
23
|
18
|
23
|
6
|
5
|
5
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21320 |
26 |
| Baker Hughes Incorporated | 4940 |
23 |
| Boart Longyear Manufacturing and Distribution Inc. | 129 |
23 |
| Longyear TM, Inc. | 97 |
10 |
| Baker Hughes, a GE Company, LLC | 2057 |
10 |
| Schlumberger Technology Corporation | 11798 |
9 |
| Schlumberger Canada Limited | 7606 |
6 |
| Smith International, Inc. | 695 |
6 |
| Saudi Arabian Oil Company | 14207 |
6 |
| Shenzhen University | 1725 |
6 |
| Veracio Ltd. | 73 |
6 |
| Schlumberger Technology B.v. | 5298 |
5 |
| Services Petroliers Schlumberger | 6024 |
5 |
| Swick Mining Services Ltd | 13 |
5 |
| Ehwa Diamond Industrial Co., Ltd. | 57 |
4 |
| Flexidrill Limited | 39 |
4 |
| Boart Longyear Company | 123 |
4 |
| Baker Hughes Holdings LLC | 3023 |
4 |
| Coreall AS | 11 |
3 |
| globalTech Corporation Pty Ltd | 33 |
3 |
| Other owners | 91 |