Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1993-12-23
1994-10-04
Word, A. Hugo
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03512398
REFERENCES:
patent: D241634 (1976-09-01), Nickerson
patent: 1651893 (1927-12-01), Jorgensen
patent: 2960797 (1960-11-01), Frenner
patent: 5154542 (1992-10-01), Klenert
Clark Doris
Crowley Richard P.
Word A. Hugo
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