- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 23/24 - Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices of advancing mechanisms the advancing mechanisms being separate from the supporting construction
Patent holdings for IPC class E21D 23/24
Total number of patents in this class: 2
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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0
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0
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0
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1
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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
|
|---|---|---|
| Council of Scientific & Industrial Research | 1435 |
1 |
| Swanson Industries, Inc. | 11 |
1 |
| Other owners | 0 |