Building units and construction elements – Architectural stock material – Transparent or translucent
Patent
1994-04-08
1995-09-12
Clark, Doris
Building units and construction elements
Architectural stock material
Transparent or translucent
Patent
active
D03623106
REFERENCES:
patent: D31329 (1899-08-01), McNeill
patent: D109025 (1938-03-01), Perkins
patent: D300061 (1989-02-01), Hackelsberger
patent: D311975 (1990-11-01), Hackelsberger
patent: 3017724 (1962-01-01), Frank
Fleming Harry A.
Harrison Ralph J.
Hock Donald E.
Clark Doris
Pittsburgh Corning Corporation
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