Building units and construction elements – Prefabricated unit – Closure
Patent
1997-08-07
1999-03-16
Clark, Doris
Building units and construction elements
Prefabricated unit
Closure
2502
Patent
active
D04069048
REFERENCES:
patent: D267436 (1982-12-01), Thorne
patent: D334431 (1993-03-01), Davlantes
patent: 3797554 (1974-03-01), Johnson
patent: 4754797 (1988-07-01), Sronce
patent: 4776133 (1988-10-01), Green
Clark Doris
Slehofer Richard D.
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