Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-06-23
1979-04-24
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23 40, D2301
Patent
active
D02516772
REFERENCES:
patent: D195807 (1963-07-01), Goldtrap
patent: D206850 (1967-01-01), Schoepe
patent: D214050 (1969-05-01), Hudson
patent: 2685301 (1954-08-01), Drier
patent: 2986155 (1961-05-01), Doyle
patent: 3242940 (1966-03-01), Sirotek
patent: 3559675 (1971-02-01), Schoepe
patent: 3586017 (1971-06-01), Walters
patent: 3693649 (1972-09-01), Gordon et al.
patent: 3895645 (1975-07-01), Johnson
patent: 4065095 (1977-12-01), Johnson
Knobbe Louis J.
Largen James R.
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