Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1998-10-09
1999-11-23
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
D25 62, 2504
Patent
active
D04170121
REFERENCES:
patent: D297169 (1988-08-01), Trani, Sr.
patent: 3726360 (1973-04-01), Price et al.
patent: 4368801 (1983-01-01), Lewis
Davenport Joseph F.
Mantz Robert J.
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