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Water-heating system
United States Patent 2126732
Inventors:
Frederick, Carnes
Publication Date:
08/16/1938
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Download PDF 2126732
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Assignee:
Frederick, Carnes
Primary Class:
237/9R
Other Classes:
236/9R, 236/75, 237/19
International Classes:
F24D3/08
;
F24D3/00