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1857285
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Information
Patent Grant
1857285
References
Source
Patent Number
1,857,285
Date Filed
Not available
Date Issued
Tuesday, May 10, 1932
92 years ago
CPC
B44B3/001 - by copying
B44B2700/021 - by copying
Y10T409/301232 - including pantograph cutter-carrier
US Classifications
409 - Gear cutting, milling, or planing
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