Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1999-09-03
2000-08-08
Zarfas, Louis S.
Building units and construction elements
Architectural stock material
Construction block or brick type
2501
Patent
active
D04293460
REFERENCES:
patent: 2127914 (1938-08-01), Hadland
patent: 2201110 (1940-05-01), Makram
patent: 3780484 (1973-12-01), Muse
patent: 4860515 (1989-08-01), Browning, Jr.
patent: 5123222 (1992-06-01), Guarriello et al.
patent: 5465542 (1995-11-01), Terry
patent: 5715635 (1998-02-01), Sherwood
Delehanty Robert A.
Zarfas Louis S,.
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