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1409354
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Information
Patent Grant
1409354
References
Source
Patent Number
1,409,354
Date Filed
Not available
Date Issued
Tuesday, March 14, 1922
102 years ago
CPC
B23B51/0072 - Drills for making non-circular holes
Y10T408/35 - including plural rotating tools
US Classifications
408 - Cutting by use of rotating axially moving tool
144 - Woodworking
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