- 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 12/06 - Mechanical cleaning devices
Patent holdings for IPC class E21B 12/06
Total number of patents in this class: 72
10-year publication summary
|
6
|
5
|
5
|
9
|
1
|
8
|
6
|
4
|
4
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21318 |
13 |
| National Oilwell Varco, L.P. | 1702 |
4 |
| Tri-State Environmental, LLC | 21 |
4 |
| Schlumberger Technology Corporation | 11857 |
3 |
| Drillform Technical Services Ltd. | 43 |
3 |
| Frank's International, LLC | 239 |
3 |
| Baker Hughes Incorporated | 4916 |
2 |
| Bauer Maschinen GmbH | 246 |
2 |
| PDI, Inc. | 3 |
2 |
| Pruitt Tool & Supply Co. | 75 |
2 |
| Sandvik Mining and Construction Oy | 890 |
2 |
| Epiroc Rock Drills Aktiebolag | 663 |
2 |
| Samil Engineering & Construction Co.,Ltd | 25 |
2 |
| Schlumberger Canada Limited | 7613 |
1 |
| Schlumberger Technology B.v. | 5297 |
1 |
| Schlumberger Holdings Limited | 2686 |
1 |
| Landmark Graphics Corporation | 1505 |
1 |
| Caterpillar Inc. | 10284 |
1 |
| ABI Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH | 52 |
1 |
| Dakota Fence Company dba Dakota Fence | 6 |
1 |
| Other owners | 21 |