Air conditioner duct

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

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Details

D23387, 2304

Patent

active

D03972020

REFERENCES:
patent: 1066329 (1913-07-01), Schwedler
A delta Manufacturing Co. Inc. Cat., p. 14, #913 Y-Branch Furnace Pipe Fitting, lower middle side of page.

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