Building element

Details Building element Building element

1997-05-27

1999-06-08

Zarfas, Louis S.

Building units and construction elements

Architectural stock material

Construction block or brick type

D25116, 2501

Patent

active

D04107551

REFERENCES:
patent: D389400 (1998-01-01), Liang
patent: 408369 (1889-08-01), Bell
patent: 708471 (1902-09-01), Flood
patent: 1158051 (1915-10-01), Hopkinson
patent: 1430392 (1922-09-01), Lukens
patent: 5202166 (1993-04-01), Crompton et al.
patent: 5409325 (1995-04-01), Wu
patent: 5556228 (1996-09-01), Smith
patent: 5820304 (1998-10-01), Sorheim et al.

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