Building units and construction elements – Prefabricated unit – Closure
Patent
1987-06-09
1990-03-06
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03064867
REFERENCES:
patent: 23981 (1899-12-01), Thompson
patent: D174156 (1955-03-01), Blanchard
patent: 2795825 (1957-06-01), Miller
patent: 2935769 (1960-05-01), Lutes
patent: 3230677 (1966-01-01), Brown
patent: 4730429 (1988-03-01), Roberts
Clark Doris
Kawneer Company Inc.
Word A. Hugo
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