Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-04-05
1980-06-17
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02554798
REFERENCES:
patent: D229053 (1973-11-01), Le Blanc
patent: D243766 (1977-03-01), Isaacs
patent: 2057203 (1936-10-01), Payzer et al.
patent: 2140582 (1938-12-01), Hirshstein
patent: 2285893 (1942-06-01), Boosey
patent: 2303109 (1942-11-01), Boosey
patent: 2338971 (1944-01-01), Ross
patent: 2348723 (1944-05-01), Boosey
patent: 2464976 (1949-03-01), Gordon
Dye Bill H.
Feth Karl G.
Kalish Ralph W.
Largen James R.
San-I-Tech of St. Louis, Inc.
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