Portable stair

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Description

FIG. 1 is a front elevation of the portable stair of the present invention, the rear side elevation being the mirror image of the front elevation;

FIG. 2 is a right side elevation of the portable stair of FIG. 1, the left side elevation being the mirror image of the right side elevation;

FIG. 3 is a top plan view of the portable stair of FIG. 1; and,

FIG. 4 is a bottom plan view of the portable stair of FIG. 1.

Claims

The ornamental design for a portable stair, as shown.

Referenced Cited
U.S. Patent Documents
3443722 May 1969 Cloyd et al.
4105117 August 8, 1978 Atkin et al.
4760921 August 2, 1988 Licari
4770300 September 13, 1988 Klein
D307800 May 8, 1990 Hradisky
4950033 August 21, 1990 Anderson
D346704 May 10, 1994 Grosfillex
5518084 May 21, 1996 Short et al.
5641034 June 24, 1997 Calmeise et al.
D449386 October 16, 2001 Cheris et al.
6568506 May 27, 2003 Donnalley
D485021 January 6, 2004 Gonzalez
D512537 December 6, 2005 Barnes et al.
Patent History
Patent number: D589630
Type: Grant
Filed: Sep 10, 2007
Date of Patent: Mar 31, 2009
Inventors: Blake D. Henson (Springdale, AR), Tim Lewis Scott (Lowell, AR), James D. Thompson (Springdale, AR)
Primary Examiner: Doris Clark
Attorney: Boyd D. Cox
Application Number: 29/291,665
Classifications
Current U.S. Class: Step Stool Type (D25/65); D6/349