Building units and construction elements – Stair – ladder – scaffold – or similar support
Patent
1995-05-08
1996-09-03
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Patent
active
D03734277
REFERENCES:
patent: D306488 (1990-03-01), Mosburg
patent: 5105910 (1992-04-01), Engstrom
patent: 5186276 (1993-02-01), Craig
patent: 5205375 (1993-04-01), Shriver
patent: 5234076 (1993-08-01), Louk et al.
Clark Doris
Hudak James A.
LandOfFree
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