Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-06-20
1978-11-28
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02504162
REFERENCES:
patent: D236115 (1975-07-01), Bjorklund
Largen James R.
Parker Robert L.
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