Building units and construction elements – Prefabricated unit – Closure
Patent
1991-09-13
1994-09-06
Largen, James R.
Building units and construction elements
Prefabricated unit
Closure
Patent
active
D03504000
REFERENCES:
patent: D304617 (1989-11-01), Werthman
patent: D305069 (1989-12-01), De Block et al.
patent: 2494161 (1950-01-01), Blackman
patent: 2775798 (1957-01-01), Bent
patent: 3239976 (1966-03-01), Hall
patent: 4222220 (1980-09-01), Beirnes
patent: 4263760 (1981-04-01), Gell
De Block David A.
Neilly Albert J.
Clark Doris
Largen James R.
ODL Incorporated
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