Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1990-10-02
1993-08-03
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03380750
REFERENCES:
patent: D73064 (1927-07-01), Caluori
patent: D73969 (1927-11-01), Day
patent: D195200 (1963-05-01), Lanz
patent: D244094 (1977-04-01), Willard
Clark Doris
Word A. Hugo
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