Folding steps

Details Folding steps Folding steps

2005-08-09

2005-08-09

Chin-Shue, Alvin (Department: 3634)

Fire escape, ladder, or scaffold

Convertible

Ladder

C182S152000, C182S106000

Reexamination Certificate

active

06926119

ABSTRACT:
A climbing aid for assisting people to move up or down to different levels has steps that can be folded into attached integral handrails that circumscribe the steps when folded so that no parts extend outside of the boundaries of the handrails.

REFERENCES:
patent: 540794 (1895-06-01), Koch
patent: 988086 (1911-03-01), Garraway
patent: 1165588 (1915-12-01), Garraway
patent: D148385 (1948-01-01), Paulus
patent: D157436 (1950-02-01), Rogers
patent: 2861731 (1958-11-01), Robinson
patent: 3130814 (1964-04-01), Aquila
patent: 3142351 (1964-07-01), Green
patent: 3142355 (1964-07-01), Danielson
patent: 3207260 (1965-09-01), Castagna
patent: D214264 (1969-05-01), Holbrook
patent: 4711282 (1987-12-01), Frazier
patent: 6571915 (2003-06-01), de la Tour

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