- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 37/18 - Other methods or devices for dislodging with or without loading by electricity
Patent holdings for IPC class E21C 37/18
Total number of patents in this class: 73
10-year publication summary
|
3
|
3
|
2
|
5
|
1
|
3
|
10
|
7
|
2
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| SDG, LLC | 57 |
15 |
| Halliburton Energy Services, Inc. | 20946 |
9 |
| Chevron U.S.A. Inc. | 3992 |
5 |
| Off-World, Inc. | 19 |
5 |
| Petram Technologies, Inc. | 12 |
4 |
| Foro Energy, Inc. | 106 |
3 |
| Epiroc Rock Drills Aktiebolag | 532 |
2 |
| Arcbyt, Inc. | 14 |
2 |
| Sidney Resources Corp | 2 |
2 |
| EarthGrid PBC | 26 |
2 |
| I-cube Research | 3 |
2 |
| Schlumberger Technology Corporation | 10881 |
1 |
| Schlumberger Canada Limited | 7366 |
1 |
| Schlumberger Technology B.v. | 5183 |
1 |
| Schlumberger Holdings Limited | 2803 |
1 |
| Auburn University | 508 |
1 |
| China University of Mining and Technology, Beijing | 95 |
1 |
| Gekko Systems Pty Ltd | 36 |
1 |
| Herrenknecht AG | 203 |
1 |
| IHC Holland IE B.V. | 264 |
1 |
| Other owners | 13 |