Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-08-04
1980-10-14
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2302
Patent
active
D02573865
REFERENCES:
patent: D190555 (1961-06-01), Weidnor
patent: D245425 (1977-08-01), Annis
patent: 2790182 (1957-04-01), Malin
patent: 2980919 (1961-04-01), Otto et al.
patent: 3001206 (1961-09-01), Strehlke
patent: 3086223 (1963-04-01), Guss
patent: 3389826 (1968-06-01), Wall
patent: 3435464 (1969-04-01), Harding
patent: 3675250 (1972-07-01), Bengtsson
Largen James R.
Marrs Roger A.
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