Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1981-01-26
1983-10-11
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02709350
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patent: 4350372 (1982-09-01), Logsdon
Boswell K. H.
Largen James R.
O'Brian Edward D.
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