Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-04-28
1981-03-24
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2302
Patent
active
D02586800
REFERENCES:
patent: 1038799 (1912-09-01), Swyney
patent: 1408830 (1922-03-01), Rowe
patent: 1468565 (1923-09-01), Guth
patent: 1480082 (1924-01-01), Kratochvil
Largen James R.
Lind John E.
W. & G. Sissons, Limited
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