Building units and construction elements – Architectural stock material – Extruded shape
Patent
1995-04-07
1996-10-08
Clark, Doris
Building units and construction elements
Architectural stock material
Extruded shape
Patent
active
D03744884
REFERENCES:
patent: 3103374 (1963-09-01), Portnog
patent: 4453346 (1984-06-01), Powell et al.
patent: 4782630 (1988-11-01), Kleyn
patent: 5345722 (1994-09-01), McKann
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