- 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 10/38 - Percussion drill bits characterised by conduits or nozzles for drilling fluids
Patent holdings for IPC class E21B 10/38
Total number of patents in this class: 133
10-year publication summary
|
15
|
7
|
14
|
5
|
14
|
8
|
5
|
5
|
12
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Intellectual Property AB | 1482 |
14 |
| Sandvik Mining and Construction Tools AB | 172 |
12 |
| Sandvik Mining and Construction Oy | 836 |
7 |
| Oy Atlas Copco Rotex Ab | 18 |
5 |
| Baker Hughes Incorporated | 5274 |
4 |
| Mincon Nordic Oy | 14 |
4 |
| MMC Ryotec Corporation | 30 |
4 |
| China University of Petroleum (East China) | 377 |
3 |
| Mincon International Limited | 54 |
3 |
| Varel International Ind., L.P. | 69 |
3 |
| Hard Rock Horizontal Directional Drilling Products, Inc. | 6 |
3 |
| Epiroc Drilling Tools Aktiebolag | 82 |
3 |
| Terraroc Finland Oy | 19 |
3 |
| Center Rock Inc. | 45 |
2 |
| Hypersciences, Inc. | 42 |
2 |
| Louisiana Tech University Research Foundation | 18 |
2 |
| Strada Design Limited | 9 |
2 |
| TMT - Tapping Measuring Technology SARL | 32 |
2 |
| Kamco North Holding Company Inc. | 6 |
2 |
| Robit Oyj | 13 |
2 |
| Other owners | 51 |