Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1989-03-20
1991-01-29
Zarfas, Louis S.
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03142400
REFERENCES:
patent: D298464 (1988-11-01), Roote
patent: 3239981 (1966-03-01), Fitzgerald
patent: 4052131 (1976-04-01), Lowrigkeit
Clark Doris
Zarfas Louis S,.
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