Building units and construction elements – Prefabricated unit – Closure
Patent
1988-09-19
1991-11-05
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03214036
REFERENCES:
patent: 1783732 (1930-12-01), Levi
patent: 3080621 (1963-03-01), Mendelsohn
patent: 4193225 (1980-03-01), Posner et al.
patent: 4283883 (1981-08-01), Sterner, Jr.
patent: 4290234 (1981-09-01), DeMaria
patent: 4831778 (1989-05-01), Schmidt et al.
Piles Jonathan
Westphal Dennis
Certain-Teed Corporation
Clark Doris
Word A. Hugo
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