- 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: 256
10-year publication summary
|
33
|
19
|
24
|
22
|
23
|
18
|
22
|
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. | 20891 |
26 |
| Baker Hughes Incorporated | 5247 |
24 |
| Boart Longyear Manufacturing and Distribution Inc. | 112 |
18 |
| Schlumberger Technology Corporation | 10717 |
10 |
| Longyear TM, Inc. | 101 |
10 |
| Baker Hughes, a GE Company, LLC | 2112 |
10 |
| Boart Longyear Company | 158 |
8 |
| Smith International, Inc. | 717 |
7 |
| Veracio Ltd. | 64 |
7 |
| Schlumberger Canada Limited | 7296 |
6 |
| Shenzhen University | 1639 |
6 |
| Schlumberger Technology B.v. | 5168 |
5 |
| Saudi Arabian Oil Company | 13155 |
5 |
| Services Petroliers Schlumberger | 5788 |
5 |
| Swick Mining Services Ltd | 13 |
5 |
| Ehwa Diamond Industrial Co., Ltd. | 62 |
4 |
| Flexidrill Limited | 46 |
4 |
| Sandvik Intellectual Property AB | 1484 |
4 |
| Baker Hughes Holdings LLC | 3007 |
4 |
| Coreall AS | 11 |
3 |
| Other owners | 85 |