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1921735
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Information
Patent Grant
1921735
References
Source
Patent Number
1,921,735
Date Filed
Not available
Date Issued
Tuesday, August 8, 1933
90 years ago
CPC
F24H1/523 - Heat exchangers for sanitary water directly heated by the burner
F24H1/48 - Water heaters for central heating incorporating heaters for domestic water
US Classifications
122 - Liquid heaters and vaporizers
D23 - Environmental heating and cooling
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