Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1992-10-28
1994-09-27
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03510310
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Crawford John L.
Crawford Winnie M. G.
Sowder John M.
Clark Doris
Infinity Stone, Inc.
Word A. Hugo
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