- 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 10/04 - Core bits with core destroying means
Patent holdings for IPC class E21B 10/04
Total number of patents in this class: 41
10-year publication summary
|
2
|
1
|
2
|
1
|
7
|
3
|
2
|
1
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Veracio Ltd. | 66 |
8 |
| Boart Longyear Company | 148 |
4 |
| Saudi Arabian Oil Company | 13857 |
3 |
| Coreall AS | 11 |
2 |
| National Oilwell Varco, L.P. | 1702 |
2 |
| Aramco Overseas Company B.V. | 19 |
2 |
| Geoprober Ltd. | 7 |
2 |
| Schlumberger Technology Corporation | 11274 |
1 |
| Schlumberger Canada Limited | 7487 |
1 |
| Schlumberger Technology B.v. | 5245 |
1 |
| Schlumberger Holdings Limited | 2754 |
1 |
| Halliburton Energy Services, Inc. | 21098 |
1 |
| Smith International, Inc. | 704 |
1 |
| Aramco Services Company | 4157 |
1 |
| Bly IP Inc. | 31 |
1 |
| China University of Petroleum (East China) | 400 |
1 |
| Jilin University | 283 |
1 |
| Longyear TM, Inc. | 100 |
1 |
| Prad Research and Development Limited | 2684 |
1 |
| Services Petroliers Schlumberger | 5923 |
1 |
| Other owners | 5 |