Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1989-09-21
1992-05-26
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03265315
REFERENCES:
patent: D238168 (1975-12-01), Ketcham
patent: 457982 (1891-08-01), Bohme
patent: 1097148 (1914-05-01), Swanson
patent: 1892605 (1932-12-01), Betzler
patent: 2119921 (1938-06-01), Levy
patent: 3221614 (1965-12-01), Pertien
patent: 4794749 (1989-01-01), Marcel
Clark Doris
Word A. Hugo
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