Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1975-11-10
1977-02-22
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02434547
REFERENCES:
patent: 2143248 (1939-01-01), Otto
patent: 2671573 (1954-03-01), Hendon et al.
patent: 2792125 (1957-05-01), Gallacher
patent: D234461 (1975-03-01), Piotrowski
Kerr Donald R.
Kerr Marvin D.
Largen James R.
Nimmer George R.
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