Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1983-02-10
1984-08-28
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
Patent
active
D02753120
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patent: D235206 (1975-05-01), Bertrand
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patent: 3950253 (1976-04-01), Stern
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patent: 4287057 (1981-09-01), Stanley
patent: 4312754 (1982-01-01), LaFontaine
Largen James R.
Massa Robert E.
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