Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1981-02-02
1983-03-15
Rademaker, Charles A.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D21185, D2301
Patent
active
D02682796
REFERENCES:
patent: D66756 (1925-03-01), Spear
patent: D203999 (1966-03-01), Schenk
patent: D260279 (1981-08-01), Geller et al.
patent: 4235378 (1980-11-01), Melin et al.
Geller Douglas A.
McElroy David C.
Rademaker Charles A.
Wham-O-Mfg. Co.
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