Rigidified step ladder

Details Rigidified step ladder Rigidified step ladder

2006-09-19

2006-09-19

Chin-Shue, Alvin (Department: 3634)

Fire escape, ladder, or scaffold

Ladder with pivoted prop

C182S228400

Reexamination Certificate

active

07108103

ABSTRACT:
A step ladder includes rigidified left and right legs and step units between the legs. Each rigidified leg includes a web interconnecting first and second tubular members. Each step unit includes a hollow step including an internal rigidifying partition wall and step mounts for coupling the hollow step to the legs.

REFERENCES:
patent: 872165 (1907-11-01), Adler
patent: 1045957 (1912-12-01), Dicks
patent: 1616899 (1927-02-01), Ingersoll
patent: 1806502 (1931-05-01), Rosenberg
patent: 2347065 (1944-04-01), Rigby
patent: 2533391 (1950-12-01), Miller
patent: 2633376 (1953-03-01), Foshee
patent: 5722507 (1998-03-01), Kain
patent: 5762163 (1998-06-01), Kain
patent: 5937968 (1999-08-01), Gibson
patent: 6026933 (2000-02-01), King
patent: 6039149 (2000-03-01), Bedja
patent: 6158749 (2000-12-01), Roudebush
patent: 6390238 (2002-05-01), Gibson et al.
patent: 6427805 (2002-08-01), Gibson et al.
patent: 6443261 (2002-09-01), Gibson
patent: 6454050 (2002-09-01), Gibson
patent: 6550579 (2003-04-01), Gibson
patent: 437879 (1991-07-01), None

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