Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1976-08-10
1979-03-06
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23 2, D2303
Patent
active
D02512572
REFERENCES:
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patent: D186218 (1959-09-01), Crouther
patent: D192801 (1962-05-01), Valentino
patent: D207693 (1967-05-01), Haug et al.
patent: 2690172 (1954-09-01), Miller
patent: 2728336 (1955-12-01), Elgeti
patent: 3281573 (1966-10-01), Hynes et al.
patent: 3622748 (1971-04-01), Sellers
Harpman Webster B.
Hy-Way Heat Systems, Inc.
Largen James R.
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