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3763681
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Information
Patent Grant
3763681
References
Source
Patent Number
3,763,681
Date Filed
Not available
Date Issued
Tuesday, October 9, 1973
50 years ago
CPC
F28D1/0477 - the conduits being bent in a serpentine or zig-zag
B21B23/00 - Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00
B21C37/14 - Making tubes from double flat material
B21C37/15 - Making tubes of special shape Making tube fittings
B21D53/085 - with fins places on zig-zag tubes or parallel tubes
Y10T29/4935 - Heat exchanger or boiler making
US Classifications
072 - Metal deforming
029 - Metal working
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