Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1981-10-09
1983-12-13
Kemper, Catherine E.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23131, D0708
Patent
active
D02717948
REFERENCES:
patent: D258342 (1981-02-01), Bouus et al.
patent: 904756 (1908-11-01), Clement
patent: 1095276 (1914-05-01), Groth
patent: 1767312 (1930-06-01), Russell
patent: 3421495 (1969-01-01), Winegardner
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