Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-07-24
1981-06-16
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02595842
REFERENCES:
patent: D218519 (1970-08-01), Mese
patent: D251011 (1979-02-01), Krechel et al.
patent: 3211416 (1965-10-01), Billeter et al.
patent: 3246872 (1966-04-01), Seltsam
patent: 3614057 (1971-10-01), Nelson
Riley Charles D.
Waddell Charles G.
Hydro Service & Supplies, Inc.
Largen James R.
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