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3253326
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Information
Patent Grant
3253326
References
Source
Patent Number
3,253,326
Date Filed
Not available
Date Issued
Tuesday, May 31, 1966
58 years ago
CPC
B21D7/00 - Bending rods, profiles, or tubes
B21C37/283 - Making U-pieces
Y10T29/49361 - Tube inside tube
Y10T29/49861 - Sizing mating parts during final positional association
Y10T29/49879 - Spaced wall tube or receptacle
US Classifications
029 - Metal working
138 - Pipes and tubular conduits
165 - Heat exchange
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