Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1994-10-24
1995-12-19
Clark, Doris
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03654044
REFERENCES:
patent: D317048 (1991-05-01), Forsberg
patent: 1350399 (1920-08-01), Wilson
patent: 3222830 (1965-12-01), Ivana
patent: 4413924 (1983-11-01), Ijima
patent: 4514949 (1985-05-01), Crespo
Clark Doris
Landry Alice L.
Roddy Kenneth A.
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