Building units and construction elements – Prefabricated unit – Closure
Patent
1988-11-14
1992-06-02
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03267237
REFERENCES:
patent: 2690797 (1954-10-01), Eriksen
patent: 3109585 (1963-11-01), Freeman
patent: 4365620 (1982-12-01), Bliamptis
patent: 4702037 (1987-10-01), Hollowel et al.
Clark Doris
Word A. Hugo
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