Building units and construction elements – Prefabricated unit – Closure
Patent
1996-02-16
1997-04-15
Clark, Doris
Building units and construction elements
Prefabricated unit
Closure
D25 48
Patent
active
D03788539
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patent: D330089 (1992-10-01), Bonger
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patent: 1922370 (1933-08-01), Johnson et al.
patent: 2093020 (1937-09-01), Norberg
patent: 2242499 (1941-05-01), Ainsworth
patent: 4060437 (1977-11-01), Strout
patent: 4854365 (1989-08-01), Juneau
patent: 5168915 (1992-12-01), LaFleur
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