Building units and construction elements – Structure
Patent
1989-02-09
1992-07-07
Zarfas, Louis S.
Building units and construction elements
Structure
D25 15, D25 22, D25 30
Patent
active
D03277445
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patent: 4879850 (1989-11-01), Glassco et al.
patent: 4918882 (1990-04-01), Funk
Coles Doris V.
Zarfas Louis S,.
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