Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-08-08
1979-12-18
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02537168
REFERENCES:
patent: D240733 (1976-07-01), Roller
patent: 2764181 (1956-09-01), Richolt
patent: 2971536 (1961-02-01), Junck et al.
patent: 4009864 (1971-03-01), Schexnayder
Largen James R.
Williams Michael
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