Building units and construction elements – Prefabricated unit – Closure
Patent
1988-01-19
1989-02-07
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D02997576
REFERENCES:
patent: D180931 (1957-09-01), Curtze
patent: 3738062 (1973-06-01), Ughi
patent: 3942576 (1976-03-01), Rickard
patent: 4121378 (1978-10-01), Wahl
John Sterling Corporation
Word A. Hugo
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