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454186
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Information
Patent Grant
454186
References
Source
Patent Number
454,186
Date Filed
Not available
Date Issued
Tuesday, June 16, 1891
133 years ago
CPC
B21D9/12 - by pushing over a curved mandrel by pushing through a curved die
Y10T29/49439 - Trap making
US Classifications
072 - Metal deforming
029 - Metal working
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