Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1995-07-20
1997-07-22
Barkai, Raphael
Building units and construction elements
Architectural stock material
Construction block or brick type
2501
Patent
active
D03814378
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patent: 2541460 (1951-02-01), Bugh
patent: 3619935 (1971-11-01), Gregoire
patent: 4372091 (1983-02-01), Brown et al.
patent: 4619560 (1986-10-01), Crinnion et al.
patent: 5505034 (1996-04-01), Dueck
Barkai Raphael
G.P. Industries, Inc.
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