Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1979-11-05
1982-11-30
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23122, D2304
Patent
active
D02671158
REFERENCES:
patent: D229183 (1973-11-01), Papst
patent: D236471 (1975-08-01), Wahlstrom
patent: D244856 (1977-06-01), Haufe et al.
patent: D256501 (1980-08-01), Glucksman
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