Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1980-07-28
1982-08-17
Kemper, Catherine E.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D 9322, D21114, D2303
Patent
active
D02658500
REFERENCES:
patent: D4174 (1870-06-01), Bauer
patent: D4336 (1870-09-01), Hilton
patent: 495027 (1893-04-01), Dengel
patent: 880106 (1908-02-01), Shimek
patent: 1641209 (1927-09-01), Wallace
patent: 1771303 (1930-07-01), Lyon
patent: 2019604 (1935-11-01), Grieve
patent: 2110641 (1938-03-01), Althoff
patent: 3993040 (1976-11-01), Antone
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