Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-03-30
1978-08-22
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02490501
REFERENCES:
patent: D195828 (1963-08-01), Stapleton
patent: D235340 (1975-06-01), Mize
patent: 2567958 (1951-09-01), Mummert
American City, Apr. 1961, p. 170, "Cole" Advertisement.
Friesen Elmer
Friesen Ronald
Ade Stanley G.
Largen James R.
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