Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1996-10-08
1997-12-09
Barkai, Raphael
Building units and construction elements
Architectural stock material
Construction block or brick type
2501
Patent
active
D03874338
REFERENCES:
patent: D58660 (1921-08-01), Clouser et al.
patent: D266361 (1982-09-01), Coelho dos Santos
patent: D266364 (1982-09-01), Coelho dos Santos
patent: D340772 (1993-10-01), Harrison
patent: D340776 (1993-10-01), Harrison
patent: 3318059 (1967-05-01), Wright
patent: 3685244 (1972-08-01), Palmer
patent: 4614071 (1986-09-01), Sams et al.
Barkai Raphael
E. P. Henry Corporation
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