- 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 1/36 - Tool-carrier piston type, i.e. in which the tool is connected to an impulse member
Patent holdings for IPC class E21B 1/36
Total number of patents in this class: 7
10-year publication summary
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0
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0
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0
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0
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1
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2
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0
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0
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0
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mincon International Limited | 57 |
2 |
| Halliburton Energy Services, Inc. | 21284 |
1 |
| Doosan Infracore Co., Ltd. | 308 |
1 |
| Everdigm Corp. | 11 |
1 |
| Sandvik Mining and Construction Oy | 889 |
1 |
| S.m Metal Co., Ltd. | 3 |
1 |
| Other owners | 0 |