- 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 1/38 - Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member
Patent holdings for IPC class E21B 1/38
Total number of patents in this class: 77
10-year publication summary
|
7
|
3
|
0
|
5
|
6
|
10
|
5
|
10
|
7
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Mining and Construction Oy | 886 |
7 |
| Mincon International Limited | 57 |
6 |
| Caterpillar Inc. | 10272 |
5 |
| Epiroc Rock Drills Aktiebolag | 656 |
5 |
| Atlas Copco Rock Drills AB | 123 |
4 |
| Center Rock Inc. | 47 |
4 |
| Montabert | 56 |
4 |
| Optimum Petroleum Services Inc. | 8 |
3 |
| Saudi Arabian Oil Company | 14207 |
3 |
| Obschestvo S Ogranichennoy Otvetstvennostyu Upravlyayushchaya Kompaniya "traditsiya" | 6 |
3 |
| Drillroc Pneumatic Pty Ltd | 7 |
2 |
| Rockdrill Services Australia Pty Ltd | 2 |
2 |
| Rockmore International, Inc. | 7 |
2 |
| National Technology & Engineering Solutions of Sandia, LLC | 1950 |
2 |
| Terramek OÜ | 4 |
2 |
| Hilti Aktiengesellschaft | 3662 |
1 |
| Aramco Services Company | 4188 |
1 |
| Brooke Erin Desantis | 32 |
1 |
| The Charles Machine Works, Inc. | 419 |
1 |
| Dalian University of Technology | 1593 |
1 |
| Other owners | 18 |