Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-07-13
1979-08-21
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02527030
REFERENCES:
patent: D216693 (1970-03-01), Dammer
patent: 580515 (1897-04-01), Weeden
patent: 1317446 (1919-09-01), Hollaender, Jr.
patent: 1317574 (1919-09-01), Grosvold
patent: 2985465 (1961-05-01), Church
patent: 3602530 (1971-08-01), Elwart
patent: 3731952 (1973-05-01), Elwart
Bucknam Ralph E.
Largen James R.
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