- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 15/24 - Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
Patent holdings for IPC class E21D 15/24
Total number of patents in this class: 6
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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2
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0
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3
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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
|
|---|---|---|
| R.J. Goldspink PTY Limited | 7 |
3 |
| R. J. Goldspink Pty Limited | 4 |
2 |
| Eickhoff Maschinenfabrik GmbH | 1 |
1 |
| Other owners | 0 |