- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 5/10 - Lining shaftsLinings therefor with iron or steel in the form of tubbing
Patent holdings for IPC class E21D 5/10
Total number of patents in this class: 13
10-year publication summary
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0
|
2
|
0
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0
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2
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0
|
1
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0
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Relborgn Pty Ltd | 14 |
3 |
| Triomviri Pty Ltd Trading AS The Grobler Partnership | 13 |
3 |
| Contech Engineered Solutions LLC | 278 |
1 |
| JFE Metal Products & Engineering Inc. | 7 |
1 |
| Advantic LLC | 2 |
1 |
| JFE Metal Products Corporation | 10 |
1 |
| China Coal Research Institute | 19 |
1 |
| Kato Construction Co., Ltd. | 2 |
1 |
| Technicore Underground Inc. | 8 |
1 |
| Other owners | 0 |