Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1976-08-20
1977-08-30
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02456184
REFERENCES:
patent: D186757 (1959-11-01), Hruby, Jr.
patent: D215936 (1969-11-01), Contreras
patent: D235445 (1975-06-01), Mackay et al.
patent: 2343804 (1944-03-01), Salemme
patent: 2608443 (1952-08-01), Hinderer
patent: 3801019 (1974-04-01), Trenary et al.
patent: 3920185 (1975-11-01), Kwok
Cole George M.
Largen James R.
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