Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1985-07-17
1989-02-07
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
D25114
Patent
active
D02997592
REFERENCES:
patent: 4067196 (1978-01-01), Schraudenbach
patent: 4227829 (1980-10-01), Landry, Jr.
patent: 4375928 (1983-03-01), Crow et al.
Dunsmuir George H.
Word A. Hugo
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