Fireplace heat exchanger

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified

Patent

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Details

D23 94, D231382, D23 95

Patent

active

D02733234

REFERENCES:
patent: D253067 (1979-10-01), Hartley
patent: 4010729 (1977-03-01), Egli
patent: 4170217 (1979-10-01), Mayes
patent: 4271814 (1981-06-01), Lister

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