Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1975-11-05
1977-06-07
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02446057
REFERENCES:
patent: 1846623 (1932-02-01), Volk et al.
patent: 2109187 (1938-02-01), Vogel
patent: 2688976 (1954-09-01), Baker
patent: 3858599 (1975-01-01), Carlson
Kurz W. W.
Largen James R.
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