Construction unit

Details Construction unit Construction unit

1997-11-13

1999-09-21

Barkai, Raphael

Building units and construction elements

Architectural stock material

Construction block or brick type

D21488, 2501

Patent

active

D04142764

REFERENCES:
patent: D196362 (1963-09-01), Bassetti
patent: D214745 (1969-07-01), Walker
patent: D307792 (1990-05-01), Poulsen
patent: D324704 (1992-03-01), Lawson et al.
patent: D370503 (1996-06-01), Burns
patent: D392749 (1998-03-01), Murray et al.
patent: 2902821 (1959-09-01), Kelly, Jr.
patent: 3310906 (1967-03-01), Glukes
patent: 3834182 (1974-09-01), Trask
patent: 5073138 (1991-12-01), Klitsner et al.
patent: 5137485 (1992-08-01), Penner
patent: 5653621 (1997-08-01), Yao

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