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1297478
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Information
Patent Grant
1297478
References
Source
Patent Number
1,297,478
Date Filed
Not available
Date Issued
Tuesday, March 18, 1919
105 years ago
CPC
E21D17/01 - characterised by the shape of the cap
Y10T403/7129 - Laterally spaced rods
US Classifications
052 - Static structures
403 - Joints and connections
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