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1393740
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Information
Patent Grant
1393740
References
Source
Patent Number
1,393,740
Date Filed
Not available
Date Issued
Tuesday, October 18, 1921
103 years ago
CPC
F28D1/0233 - with air flow channels
F28D1/05308 - Assemblies of conduits connected side by side or with individual headers
Y10S165/332 - Coaxial ducts define air draft passage and annular passage for heat exchange fluid
US Classifications
165 - Heat exchange
237 - Heating systems
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