- 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 4/12 - Electrically operated hammers
Patent holdings for IPC class E21B 4/12
Total number of patents in this class: 18
10-year publication summary
|
2
|
9
|
3
|
0
|
0
|
2
|
0
|
0
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20835 |
6 |
| Welltec AS | 297 |
2 |
| Schlumberger Technology Corporation | 10662 |
1 |
| Panasonic Intellectual Property Management Co., Ltd. | 31201 |
1 |
| Aramco Services Company | 3929 |
1 |
| Robertson Intellectual Properties, LLC | 90 |
1 |
| Aramco Overseas Company B.V. | 20 |
1 |
| Geoprober Ltd. | 7 |
1 |
| Baker Hughes, a GE Company, LLC | 2114 |
1 |
| Baker Hughes, LLC | 12 |
1 |
| Zhaw - Zurcher Hochschule fur angewandte Wissenschaften | 13 |
1 |
| Baker Hughes Holdings LLC | 3005 |
1 |
| Other owners | 0 |