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1991194
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Information
Patent Grant
1991194
References
Source
Patent Number
1,991,194
Date Filed
Not available
Date Issued
Tuesday, February 12, 1935
90 years ago
CPC
F28D1/024 - with an air driving element
Y10S165/308 - Coaxial impellers
Y10S285/923 - Specific material
US Classifications
165 - Heat exchange
285 - Pipe joints or couplings
415 - Rotary kinetic fluid motors or pumps
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