Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1981-03-19
1984-06-12
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23 65, D23 68
Patent
active
D02742888
REFERENCES:
patent: D35617 (1902-01-01), Desormour
patent: D63998 (1924-02-01), Ek
patent: D160222 (1950-09-01), Skidmore
patent: D202413 (1965-09-01), Tiller
patent: D240930 (1976-08-01), Kristoffersen
patent: 951604 (1910-03-01), Fuller
patent: 1155885 (1915-10-01), Cutchings
patent: 1243148 (1917-10-01), Erwin
patent: 1798632 (1931-03-01), Romer
patent: 4012797 (1977-03-01), Kristoffersen
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