Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-04-11
1979-04-17
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D14 99, D2303
Patent
active
D02516055
REFERENCES:
patent: D37345 (1905-02-01), Hart
patent: D104763 (1937-06-01), Black
patent: D167337 (1952-07-01), De Roo et al.
patent: D169374 (1953-04-01), Kiesner
patent: D204351 (1966-04-01), Caine
patent: 2882478 (1959-04-01), Hobart et al.
patent: 3011422 (1961-12-01), Scallon
patent: 3167688 (1965-01-01), Hein
patent: 3245224 (1966-04-01), Wilkinson
Alexander Cruzan
Largen James R.
Minnesota Mining and Manufacturing Company
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