Fire escape – ladder – or scaffold – Ladder with pivoted prop – Pivoted to top-step cleat
Reexamination Certificate
2006-01-17
2006-01-17
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Ladder with pivoted prop
Pivoted to top-step cleat
C182S025000
Reexamination Certificate
active
06986405
ABSTRACT:
A ladder comprises a foldable frame, a leg spreader, and a leg brace. The leg brace biases leg units of the frame toward one another to stiffen the frame in response to spreading of the leg units away from one another to an unfolded position by the leg spreader.
REFERENCES:
patent: 121190 (1871-11-01), Oakley
patent: 159319 (1875-02-01), Grunewald
patent: 317884 (1885-05-01), Temple
patent: 531641 (1895-01-01), Payne
patent: 540948 (1895-06-01), Bruch
patent: 551445 (1895-12-01), Liefer
patent: 554695 (1896-02-01), Hood
patent: 847205 (1907-03-01), Rowe
patent: 870940 (1907-11-01), Dahl
patent: 920733 (1909-05-01), Groves
patent: 1110700 (1914-09-01), LeVey
patent: 1212548 (1917-01-01), Parent
patent: 1549402 (1925-08-01), Wittliff
patent: 2172860 (1939-09-01), Weaver
patent: 2470053 (1949-05-01), Salisbury
patent: 2960181 (1960-11-01), Bufogle
patent: 4995525 (1991-02-01), Kehrer
patent: 5715909 (1998-02-01), Gagnon
patent: 5752581 (1998-05-01), Orchowski
patent: 6427805 (2002-08-01), Gibson et al.
patent: 2003/0132058 (2003-07-01), Pollock
Barnes & Thornburg LLP
Chin-Shue Alvin
Cosco Management Inc.
LandOfFree
Ladder with leg brace does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ladder with leg brace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ladder with leg brace will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3528347