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1555386
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Information
Patent Grant
1555386
References
Source
Patent Number
1,555,386
Date Filed
Not available
Date Issued
Tuesday, September 29, 1925
98 years ago
CPC
E01F13/126 - Pitfall barriers, causing the vehicle to face a step-like obstruction
B61L29/026 - Preventing access by means of obstacles raising across the route
US Classifications
246 - Railway switches and signals
049 - Movable or removable closures
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