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1457193
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Information
Patent Grant
1457193
References
Source
Patent Number
1,457,193
Date Filed
Not available
Date Issued
Tuesday, May 29, 1923
101 years ago
CPC
B21D28/285 - punching outwards
B21D28/28 - in tubes or other hollow bodies
Y10T409/307112 - Simultaneously
Y10T409/307168 - Plural cutters
US Classifications
409 - Gear cutting, milling, or planing
166 - Wells
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