Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1983-07-11
1986-10-21
Burke, Wallace R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23 42
Patent
active
D02863197
REFERENCES:
patent: D142841 (1945-11-01), D'Algondt
patent: D254928 (1980-05-01), Mathis
patent: D261419 (1981-10-01), Moreland
patent: 1996279 (1935-04-01), Dillon
patent: 4359790 (1982-11-01), Chalberg
patent: 4505814 (1985-03-01), Marshall
Hydo Air Industries, Inc. display (admitted prior art) poster illustrating a guard for water suction pipe, encircled.
Burke Wallace R.
DaRin Edward J.
Vinson Brian N.
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