Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1984-02-14
1986-09-02
Spangler, Robert C.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
Patent
active
D02854759
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patent: D230470 (1974-02-01), Frohn
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patent: D238874 (1976-02-01), Berthoud
patent: D243530 (1977-03-01), Bodine et al.
patent: D263563 (1982-03-01), Ito
patent: D264558 (1982-05-01), Maeda
patent: D278609 (1985-04-01), Satterelli
patent: 3456831 (1969-07-01), Johansson
Quality Products, Inc.
Spangler Robert C.
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