Building units and construction elements – Prefabricated unit – Closure
Patent
1978-01-03
1980-09-16
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D25 48, D25 53, D25 87, D2502
Patent
active
D02569523
REFERENCES:
patent: D1613 (1862-07-01), Sharkey
patent: D216101 (1969-11-01), Landsman
patent: D248874 (1978-08-01), Prause
patent: 377624 (1888-02-01), Kuenzel
patent: 3213555 (1965-10-01), Horn, Jr.
patent: 4000590 (1977-01-01), Kordewick
Foster Gerrit D.
Word A. Hugo
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