- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 9/13 - Devices for removing or hauling away excavated material or spoilWorking or loading platforms using hydraulic or pneumatic conveying means
Patent holdings for IPC class E21D 9/13
Total number of patents in this class: 21
10-year publication summary
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0
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2
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3
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1
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1
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3
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1
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1
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1
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2
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Herrenknecht AG | 203 |
4 |
| EarthGrid PBC | 26 |
4 |
| Bouygues Travaux Publics | 28 |
2 |
| Canadian Energy Services LP | 73 |
2 |
| Underground Extraction Technologies Pty Ltd | 17 |
2 |
| Bulk Solutions Pty Ltd | 1 |
1 |
| Denki Kagaku Kogyo Kabushiki Kaisha | 627 |
1 |
| Vermeer Manufacturing Company | 639 |
1 |
| X Development LLC | 1301 |
1 |
| Epiroc Rock Drills Aktiebolag | 523 |
1 |
| Taiko Techs Co. | 1 |
1 |
| China Railway Sunward Engineering Equipment Co., Ltd | 8 |
1 |
| Other owners | 0 |