Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1975-12-24
1977-01-25
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2302
Patent
active
D02431831
REFERENCES:
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patent: D154904 (1949-08-01), Chelfin et al.
patent: D157397 (1950-02-01), Mast et al.
patent: D169590 (1953-05-01), Hauser
patent: D198491 (1964-06-01), Macowski, Jr.
patent: D237969 (1975-12-01), Firdmann
Davis, Jr. Charley W.
Largen James R.
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