Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1977-08-19
1980-04-01
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2301
Patent
active
D02546272
REFERENCES:
patent: D177354 (1956-04-01), Wagler
patent: 669845 (1901-03-01), Melavin
patent: 1319738 (1919-10-01), Watrous
patent: 2596387 (1952-05-01), Ellinger
patent: 3319893 (1967-05-01), Rodgers
patent: 3344997 (1967-10-01), Fife
patent: 3647143 (1972-01-01), Shames
patent: 3865310 (1975-02-01), Elkins et al.
Keffer Francis C.
Kelly Charles M.
Largen James R.
Schwartz Arthur
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