Building units and construction elements – Prefabricated unit – Closure
Patent
1991-12-12
1993-11-16
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D25 48
Patent
active
D03414302
REFERENCES:
patent: D236201 (1975-08-01), Shoush
patent: 2201266 (1940-05-01), Hutchinson
patent: 2431416 (1947-11-01), Nagel
patent: 2676652 (1954-04-01), Duncan
patent: 2687771 (1954-08-01), Wilson
patent: 2875826 (1959-03-01), Brame
patent: 3363922 (1968-01-01), Anderson
patent: 3895669 (1975-07-01), Heeling
patent: 4624072 (1986-11-01), Zilkha
Clark Doris
Commonwealth of Puerto Rico
Word A. Hugo
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