Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1995-02-22
1996-08-20
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
Patent
active
D03729893
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Gile Jess S.
Jensen-Gile Leslie
Clark Doris
Litman Richard C.
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