Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1997-11-12
1998-12-29
Barkai, Raphael
Building units and construction elements
Architectural stock material
Construction block or brick type
2501
Patent
active
D04034376
REFERENCES:
patent: D279030 (1985-05-01), Risi et al.
patent: D370272 (1996-05-01), Risi et al.
patent: 2074813 (1937-03-01), Sill
patent: 4490075 (1984-12-01), Risi et al.
patent: 5622456 (1997-04-01), Risi et al.
patent: 5647185 (1997-07-01), Forlini
Risi Angelo
Risi Antonio
Barkai Raphael
Rothbury International Inc.
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