Roof ladder

Details Roof ladder Roof ladder

1998-04-30

2000-05-02

Clark, Doris

Building units and construction elements

Stair, ladder, scaffold, or similar support

Stepped

D25 64, 2504

Patent

active

D04242114

REFERENCES:
patent: D372987 (1996-08-01), Eason
patent: 4632219 (1986-12-01), Rayer
patent: 4923049 (1990-05-01), Kent et al.

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