Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1997-03-07
1998-04-28
Bullock, B. J.
Building units and construction elements
Architectural stock material
Construction block or brick type
2501
Patent
active
D03939065
REFERENCES:
patent: 4016693 (1977-04-01), Warren
patent: 4671039 (1987-06-01), Hunt
patent: 4738059 (1988-04-01), Dean, Jr.
patent: 4920712 (1990-05-01), Dean, Jr.
patent: 5044834 (1991-09-01), Janopaul, Jr.
patent: 5161918 (1992-11-01), Hodel
Miller's Concrete Masonry Units, Author, Publication Date and Source unknown.
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