Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1979-08-06
1981-09-22
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
4578, 4590, D2302
Patent
active
D02609240
REFERENCES:
patent: D203802 (1966-02-01), Graning, Jr.
patent: D212418 (1968-10-01), Doman
patent: D230402 (1974-02-01), Graning, Jr.
patent: 1522045 (1925-01-01), Burton
patent: 2058284 (1936-10-01), Addition
Crowe John H.
Largen James R.
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