Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1992-12-07
1994-02-01
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03439089
REFERENCES:
patent: D312881 (1990-12-01), Naether
patent: 1361501 (1920-12-01), Schesmoes
patent: 4190998 (1980-03-01), Keith
patent: 4544305 (1985-10-01), Hai
patent: 4711599 (1987-12-01), Glickman
patent: 4919565 (1990-04-01), Gopfert
patent: 5046887 (1991-09-01), Fontana et al.
Clark Doris
Word A. Hugo
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