Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1976-05-10
1978-09-19
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2303
Patent
active
D02495430
REFERENCES:
patent: 1049566 (1913-01-01), Delsing
patent: 1224516 (1917-05-01), Tyler
patent: 1939537 (1933-12-01), Brynjolfsson
patent: 2174888 (1939-10-01), Klann
patent: 2514583 (1950-07-01), Miller
patent: 2665683 (1954-01-01), Snook
patent: 3773029 (1973-11-01), Kent
Largen James R.
Sheridan Philip H.
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