Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1976-09-13
1978-08-22
Word, A. Hugo
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D25 74, D2304
Patent
active
D02490617
REFERENCES:
patent: D221656 (1971-08-01), Dowdell, Jr. et al.
patent: D221854 (1971-09-01), Dowdell, Jr. et al.
patent: D223577 (1972-05-01), Dowdell, Jr. et al.
patent: 3782050 (1974-01-01), Dowdell et al.
Dowdell, Jr. Joshua R.
Sanderson Paul H.
Dowco Corporation
Richards D. Carl
Word A. Hugo
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