Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1991-08-05
1993-06-22
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03366863
REFERENCES:
patent: D295789 (1988-05-01), Smith
patent: 486356 (1892-11-01), Sanders
patent: 1410953 (1922-03-01), Peirce et al.
Clark Doris
Word A. Hugo
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