Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-07-26
1979-07-10
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02523370
REFERENCES:
patent: D148507 (1948-01-01), Williams
patent: D148508 (1948-01-01), Williams
patent: D165754 (1952-01-01), Herter
patent: D229306 (1973-11-01), McGraw
patent: 2976129 (1961-03-01), Buehler
Field & Stream, Sep. 1959, p. 78, bottom left item.
Fay Robert J.
Largen James R.
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