- 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 15/04 - Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
Patent holdings for IPC class E21B 15/04
Total number of patents in this class: 197
10-year publication summary
|
4
|
16
|
21
|
19
|
16
|
13
|
19
|
9
|
16
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TT Technologies, Inc. | 151 |
15 |
| Sandvik Mining and Construction Oy | 889 |
14 |
| Schlumberger Technology Corporation | 11924 |
10 |
| Halliburton Energy Services, Inc. | 21284 |
10 |
| Black & Decker, Inc. | 2464 |
10 |
| Caterpillar Global Mining Equipment LLC | 182 |
10 |
| Vermeer Manufacturing Company | 676 |
7 |
| Epiroc Rock Drills Aktiebolag | 670 |
7 |
| National Oilwell Varco, L.P. | 1700 |
5 |
| Itrec B.V. | 504 |
4 |
| Quanta Associates, L.P. | 458 |
4 |
| Epiroc Drilling Solutions, LLC | 43 |
4 |
| Schlumberger Canada Limited | 7621 |
3 |
| Schlumberger Technology B.v. | 5299 |
3 |
| The Charles Machine Works, Inc. | 420 |
3 |
| Services Petroliers Schlumberger | 6033 |
3 |
| Tech Mining Pty Ltd | 4 |
3 |
| Resemin S.A. | 6 |
3 |
| Caterpillar Inc. | 10302 |
2 |
| Longyear TM, Inc. | 97 |
2 |
| Other owners | 75 |