Building units and construction elements – Architectural stock material
Patent
1995-03-01
1997-06-24
Clark, Doris
Building units and construction elements
Architectural stock material
2501
Patent
active
D03802787
REFERENCES:
patent: 590490 (1897-09-01), Thomas
patent: 3144103 (1964-08-01), Krueger, Jr.
patent: 4665666 (1987-05-01), Hampton
patent: 4693634 (1987-09-01), Chiaves
patent: 5351353 (1994-10-01), Walton
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