Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1996-08-30
1997-10-14
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
2504
Patent
active
D03850455
REFERENCES:
patent: D324130 (1992-02-01), Matsumoto et al.
patent: 4595078 (1986-06-01), Greenway
patent: 5141074 (1992-08-01), Sulowski et al.
patent: 5234074 (1993-08-01), Bell
Clark Doris
Dutton, Jr. Harold H.
Liebman Diane F.
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