Building units and construction elements – Architectural stock material – Construction block or brick type
Patent
1994-05-17
1996-04-30
Clark, Doris
Building units and construction elements
Architectural stock material
Construction block or brick type
Patent
active
D03694178
REFERENCES:
patent: 826639 (1906-07-01), Worster
patent: 3025641 (1962-03-01), Ahtiainen
Boral Resources (QLD) Pty. Limited
Clark Doris
LandOfFree
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