Heat retrieval unit for installation into a flue duct

Details Heat retrieval unit for installation into a flue duct Heat retrieval unit for installation into a flue duct

1979-10-22

1982-05-18

Kemper, Catherine E.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2303

Patent

active

D02645017

REFERENCES:
patent: 2693941 (1954-11-01), Bystrom
patent: 3913663 (1975-10-01), Gates
patent: 4028817 (1977-06-01), Winstel
patent: 4103735 (1978-08-01), Warner
patent: 4206804 (1980-06-01), Scholtes et al.
patent: 4219073 (1980-08-01), Talmadge et al.
patent: 4276929 (1981-07-01), Howard

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