Building block

Details Building block Building block

1989-09-26

1991-08-13

Word, A. Hugo

Building units and construction elements

Architectural stock material

Construction block or brick type

Patent

active

D03191095

REFERENCES:
patent: D191045 (1961-08-01), Kingsbury
patent: 1034033 (1912-07-01), Porter
patent: 1070870 (1913-08-01), Barbour
patent: 2975853 (1961-03-01), Friend
patent: 3330079 (1967-07-01), Mitchell et al.
patent: 4426815 (1984-01-01), Brown

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