Building units and construction elements – Prefabricated unit – Closure
Patent
1991-02-15
1993-08-24
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D 6494
Patent
active
D03387186
REFERENCES:
patent: D209738 (1968-01-01), Bachner
patent: D232894 (1974-09-01), Dillen
patent: D304983 (1989-12-01), Palka
patent: 3300900 (1967-01-01), Risk et al.
patent: 3498001 (1970-03-01), MacDonald
patent: 3731444 (1975-05-01), Tobin
patent: 4097100 (1978-06-01), Sauder
Clark Doris
Word A. Hugo
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