Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1997-10-29
1998-11-17
Lichtenstein, Lisa
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23370, D23381, 2304
Patent
active
D04013212
REFERENCES:
patent: D309944 (1990-08-01), Chiu
patent: 2658666 (1953-11-01), Krzesiewski
patent: 2900125 (1959-08-01), Quick
Electrical Merchandising, p. 138, Fan A, top of page, Apr. 1956.
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