Building units and construction elements – Prefabricated unit – Closure
Patent
1989-03-29
1989-12-12
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03050670
REFERENCES:
patent: 1099415 (1914-06-01), Winslow
patent: 4167088 (1979-09-01), Governale
patent: 4223482 (1980-09-01), Barroero et al.
Borgen Margaret Platt
Clark Doris
Word A. Hugo
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