Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1993-07-23
1997-07-29
Lichtenstein, Lisa
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
2303
Patent
active
D03817431
REFERENCES:
patent: 3996920 (1976-12-01), Andrews
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