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1863678
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Information
Patent Grant
1863678
References
Source
Patent Number
1,863,678
Date Filed
Not available
Date Issued
Tuesday, June 21, 1932
92 years ago
CPC
F28D1/0308 - the conduits being formed by paired plates touching each other
F28F3/025 - the means being corrugated, plate-like elements
Y10S165/332 - Coaxial ducts define air draft passage and annular passage for heat exchange fluid
US Classifications
165 - Heat exchange
392 - Electric resistance heating devices
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