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3470720
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Information
Patent Grant
3470720
References
Source
Patent Number
3,470,720
Date Filed
Not available
Date Issued
Tuesday, October 7, 1969
55 years ago
CPC
B21D51/08 - ball-shaped objects
F16C33/32 - Balls
Y10T29/49694 - Ball making
US Classifications
072 - Metal deforming
029 - Metal working
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