Building units and construction elements – Architectural stock material – Extruded shape
Patent
1992-06-29
1994-02-22
Word, A. Hugo
Building units and construction elements
Architectural stock material
Extruded shape
Patent
active
D03445992
REFERENCES:
patent: D300397 (1989-03-01), Michaelsen
patent: D306491 (1990-03-01), Hallengren
patent: 3566561 (1971-03-01), Tozler
patent: 4968171 (1990-11-01), Shell
Ehmke Robert J.
Schmitz David J.
Clark Doris
Design Specialties, Inc.
Word A. Hugo
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