Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-03-14
1979-08-21
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02527022
REFERENCES:
patent: D34281 (1901-03-01), Phelps
patent: D204184 (1966-03-01), Schulze
patent: D227887 (1973-07-01), Cosson
patent: 1127246 (1915-02-01), Hirshstein
patent: 1972513 (1934-09-01), Drehmann
Largen James R.
Polyphase Corporation
Richards Channing L.
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