Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1997-02-11
1999-10-26
Zarfas, Louis S.
Building units and construction elements
Architectural stock material
Construction block or brick type
2501
Patent
active
D04158458
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Heritage Stone Straight, Stone Series by Keystone Keystone retaining Wall Systems, Inc., Minneapolis MINN., pamphlet.
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Scullion Bret H.
Staten Bobby L.
Delehanty Robert A
Zarfas Louis S,.
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