Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1979-03-08
1981-10-20
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02614146
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patent: 569243 (1896-10-01), Sholder
patent: 2011320 (1935-08-01), Keys
patent: 3017123 (1962-01-01), Rinkewich et al.
patent: 3081950 (1963-03-01), Rinkewich
patent: 3082958 (1963-03-01), Thomas
L. R. Nelson Corporation
Largen James R.
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