Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1983-11-04
1986-09-30
Bullock, B. J.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
Patent
active
D02859602
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patent: 3056557 (1962-10-01), Walberg
patent: 3417923 (1968-12-01), Carlson
patent: 3893621 (1975-07-01), Johnson
patent: 3920188 (1975-11-01), Price
patent: 4325512 (1982-04-01), Kenshol
Bullock B. J.
Kalishman Neal
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