Construction block

Details Construction block Construction block

1997-07-09

1999-01-12

Barkai, Raphael

Building units and construction elements

Architectural stock material

Transparent or translucent

2501

Patent

active

D04041445

REFERENCES:
patent: D249558 (1978-09-01), Blomqvist
patent: D362310 (1995-09-01), Fleming et al.
patent: 1782147 (1930-11-01), Merryweather
patent: 2196109 (1940-04-01), Eastus
patent: 4719735 (1988-01-01), Fleming, Jr. et al.
patent: 4852321 (1989-08-01), Fleming, Jr. et al.
patent: 5440847 (1995-08-01), Butler
Sweet's Catalog, vol. 4, 1993.

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