Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1980-05-27
1982-05-11
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D 6 11, 4483, D2302
Patent
active
D02643723
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patent: 3364478 (1968-01-01), Dee Waard
patent: 3691980 (1972-09-01), Shastal
Hobbs Marmaduke A.
Largen James R.
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