Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-06-27
1980-07-22
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02560461
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patent: 3419291 (1968-12-01), Tomb et al.
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patent: 3592491 (1971-07-01), Glover
patent: 3768819 (1973-10-01), Burkert
patent: 3865386 (1975-02-01), Wilke
Freilich Arthur
Largen James R.
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