Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1999-08-24
2000-10-03
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
2504
Patent
active
D0431655&
REFERENCES:
patent: D372989 (1996-08-01), Gile et al.
patent: 3512608 (1970-05-01), Huntley
patent: 5084919 (1992-02-01), Bittle, Sr.
patent: 5333323 (1994-08-01), Aymes
Clark Doris
Keisling Trent C.
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