Building units and construction elements – Structure
Patent
1997-02-21
1998-09-01
Clark, Doris
Building units and construction elements
Structure
2503
Patent
active
D03977994
REFERENCES:
patent: D342074 (1993-12-01), Burns
patent: 1528917 (1925-03-01), Faleo
patent: 3552202 (1971-01-01), Kroeger et al.
Clark Doris
Martin Rick
Sky Venture, Inc.
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