- All sections
- E - Fixed constructions
- E01B - Permanent waypermanent-way toolsmachines for making railways of all kinds
- E01B 3/44 - Transverse or longitudinal sleepersOther means resting directly on the ballastway for supporting rails made from other materials only if the material is essential
Patent holdings for IPC class E01B 3/44
Total number of patents in this class: 73
10-year publication summary
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7
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7
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4
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7
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5
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8
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5
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7
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0
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3
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