Staircase

FIG. 1 is a front perspective view of a staircase showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines in the Figures show portions of the staircase or environment that form no part of the claimed design.

The dot-dash lines in the Figures show unclaimed boundaries that form no part of the claimed design.

The oblique shade lines in the Figures show transparency and not surface ornamentation.

Number	Name	Date	Kind
3290839	Theisen	Dec 1966	A
3331467	Blum et al.	Jul 1967	A
3747709	Ridenour	Jul 1973	A
D478999	Jobs et al.	Aug 2003	S
D481467	Brice	Oct 2003	S
7165362	Jobs et al.	Jan 2007	B2
D681850	Daly	May 2013	S
D695913	Backus et al.	Dec 2013	S
D715963	Andreini et al.	Oct 2014	S
20140079474	Andreini et al.	Mar 2014	A1

Entry
Kourakis, I., et al., “Design of a Glass Stair,” 2010 Structures Congress, pp. 2650-2659, American Society of Civil Engineers, dated May 2010, 10 pages.
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