Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1976-10-29
1978-03-14
Burke, Wallace R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2304
Patent
active
D02475103
REFERENCES:
patent: 1551528 (1925-08-01), Ford
patent: 2987979 (1961-06-01), Hezler, Jr.
patent: 3328074 (1967-06-01), Van Rossem
Burke Wallace R.
Dence Richard B.
Gandy James M.
Production Research, Inc.
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