- All sections
- E - Fixed constructions
- E01B - Permanent waypermanent-way toolsmachines for making railways of all kinds
- E01B 3/34 - Transverse or longitudinal sleepersOther means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement with pre-tensioned armouring or reinforcement
Patent holdings for IPC class E01B 3/34
Total number of patents in this class: 22
10-year publication summary
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4
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1
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2
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2
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1
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2
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