Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-11-03
1979-08-28
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2302
Patent
active
D02527650
REFERENCES:
patent: 1817330 (1931-08-01), Wilson, Jr.
patent: 2109089 (1938-02-01), Moyes
patent: 2203052 (1940-06-01), Hanson
patent: 3812544 (1974-05-01), Risley
patent: 4009497 (1977-03-01), Moon
patent: 4080667 (1978-03-01), Walsh et al.
Largen James R.
Oltman John H.
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