Project ladder

Details Project ladder Project ladder

1998-03-20

1999-06-01

Clark, Doris

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

2504

Patent

active

D04105508

REFERENCES:
patent: D387878 (1997-12-01), Jacques
patent: 1283212 (1918-10-01), Kloepfer
patent: 3269485 (1966-08-01), Larson
patent: 4494626 (1985-01-01), Ast

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