Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-10-03
1980-04-29
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02548631
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Hardware Age, Jan. 16, 1958, p. 51.
L. R. Nelson Corporation
Largen James R.
Malley John W.
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