Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1992-06-18
1994-05-24
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03472850
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Seagren Industries, Inc., St. Louis, Mo., Loffelstein Retaining Walls, pp. 1-4 and insert, Circa. 1990.
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Clark Doris
St. Louis Retaining Wall Co., Inc.
Word A. Hugo
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