Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-12-26
1981-04-14
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02589052
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patent: 3339572 (1967-09-01), Gordon et al.
patent: 3633624 (1972-01-01), Leibfritz
patent: 3680831 (1972-08-01), Fujiwara
patent: 4150686 (1979-04-01), Sherif et al.
Largen James R.
Ross Operating Valve Company
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