Retaining wall block with side openings

Details Retaining wall block with side openings Retaining wall block with side openings

1999-05-27

2000-07-18

Zarfas, Louis S.

Building units and construction elements

Architectural stock material

Construction block or brick type

2501

Patent

active

D04284992

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Gordon Schmidt, "The Story Of Concrete . . . ", concrete block illustrated, Concrete, Dec. 1958, p. 26.

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