Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1976-12-15
1979-01-16
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02508265
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patent: 2595933 (1952-05-01), Gilbertsen
patent: 2692163 (1954-10-01), Geel
patent: 2889994 (1959-06-01), French
patent: 3118607 (1964-01-01), Rocher
patent: 3158892 (1964-12-01), Bridger et al.
patent: 3202362 (1965-08-01), Wright
patent: 3998387 (1976-12-01), Maasberg
Breston Michael P.
Largen James R.
Rol-Dri, Inc.
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