Building units and construction elements – Prefabricated unit – Closure
Patent
1993-03-08
1995-01-17
Largen, James R.
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03545725
REFERENCES:
patent: 2722724 (1955-11-01), Miller
patent: 2818614 (1958-01-01), Lapka, Jr.
patent: 2999280 (1961-09-01), Miller
patent: 4352258 (1982-10-01), Bursk et al.
Clark Doris
Largen James R.
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