- 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 11/04 - Boring grabs
Patent holdings for IPC class E21B 11/04
Total number of patents in this class: 10
10-year publication summary
|
0
|
2
|
0
|
1
|
0
|
0
|
1
|
0
|
2
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bauer Maschinen GmbH | 218 |
2 |
| Obayashi Corporation | 72 |
2 |
| Obayashi Road Corporation | 8 |
2 |
| Schlumberger Technology Corporation | 10662 |
1 |
| Peak Completion Technologies, Inc. | 15 |
1 |
| Altus Intervention (technologies) AS | 65 |
1 |
| Haemers Technologies Societe Anonyme | 6 |
1 |
| Other owners | 0 |