Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1981-12-02
1984-05-01
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
128369, 4540
Patent
active
D02737000
REFERENCES:
patent: D236000 (1975-07-01), Powell
patent: D247044 (1978-01-01), Johansson
patent: 2536540 (1951-01-01), Davis
patent: 2541263 (1951-02-01), Mayo et al.
patent: 3174160 (1965-03-01), Fielding
patent: 3827087 (1974-08-01), Cuthbertson
patent: 3889304 (1975-06-01), Loren
patent: 3924278 (1975-12-01), Ekman
Largen James R.
National Research Development Corporation
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