Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1980-06-03
1982-06-29
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D25 5, D25 6, D25 14, D25 19, D25 31, D2301, D2503
Patent
active
D02652269
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American City, Feb. 1960, p. 206, left item.
American City, Jan. 1961, p. 131.
Carlat J. Keith
Cliff John O.
Largen James R.
Pittsburgh-Des Moines Corporation
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