Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-06-20
1980-04-29
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2304
Patent
active
D02548674
REFERENCES:
patent: D126991 (1941-05-01), Rubin
patent: D198681 (1964-07-01), Friedman et al.
patent: D198786 (1964-08-01), Friedman et al.
patent: D229754 (1974-01-01), Ali
patent: D230482 (1974-02-01), Levey
patent: 3355913 (1967-12-01), Frangos
The Chemist and Druggist, Sep. 25, 1954, p. 23, Item No. 16.
Dunlap Jerry J.
Largen James R.
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