Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1979-09-26
1982-07-13
O'Keefe, Veronica
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23 44, D2399
Patent
active
D02654180
REFERENCES:
patent: D93306 (1934-09-01), Sutton et al.
patent: D195540 (1963-06-01), Knight
patent: D251676 (1979-04-01), Fouts
patent: D254505 (1980-03-01), Parsons et al.
patent: D258078 (1981-01-01), Gallagher et al.
Philadelphia Valve Co., Fuel Oil and Oil Heat, Jan. 1963, p. 101, New Hose Swivel.
Beaver David L.
Chow Ho
Beatrice Foods Co.
O'Keefe Veronica
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