Building units and construction elements – Structure
Patent
1999-10-27
2000-11-07
Clark, Doris
Building units and construction elements
Structure
2503
Patent
active
D04335120
REFERENCES:
patent: D336136 (1993-06-01), Foster
patent: D338073 (1993-08-01), Wall
patent: 2572732 (1951-10-01), Keklen et al.
Clark Doris
Clear Channel International Limited
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