Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-10-23
1980-07-29
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2304
Patent
active
D02561565
REFERENCES:
patent: D218825 (1970-09-01), Blumer
patent: 2251907 (1941-08-01), Hoesel
patent: 4161941 (1979-07-01), Bloxham
Basic Energy Conservation Services, Inc.
Easton Wayne B.
Largen James R.
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