Construction block

Details Construction block Construction block

1995-01-27

1997-01-14

Clark, Doris

Building units and construction elements

Architectural stock material

Construction block or brick type

D21108

Patent

active

D03773965

REFERENCES:
patent: D67919 (1925-07-01), Wood
patent: D283635 (1986-04-01), Kato et al.
patent: 3195266 (1965-07-01), Onanian
patent: 3427774 (1969-02-01), Curtis
patent: 3488880 (1970-01-01), Taylor
patent: 3597875 (1971-08-01), Christiansen
patent: 4965979 (1990-10-01), Larrivee et al.
patent: 5035666 (1991-07-01), Kang

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