Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-10-23
1981-07-14
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02598914
REFERENCES:
patent: D234979 (1975-04-01), Miller
patent: D253716 (1979-12-01), Spitz
patent: 2402732 (1946-06-01), Cohen
patent: 2447207 (1948-08-01), Ray
patent: 2663318 (1953-12-01), Lakso
patent: 2868494 (1959-01-01), Kearns, Jr. et al.
patent: 3310069 (1967-03-01), Hoffman
patent: 3646969 (1972-03-01), Stampfli
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