Folding stairs

- RADIO SYSTEMS CORPORATION
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Description

FIG. 1 is a front perspective view of a folding stairs showing my new design in an open position;

FIG. 2 is a-rear perspective view thereof, in an open position;

FIG. 3 is a front elevational view thereof, in an open position;

FIG. 4 is a rear elevational view thereof, in an open position;

FIG. 5 is a left side elevational view thereof, in an open position;

FIG. 6 is a perspective view thereof, in a folded position;

FIG. 7 is a top plan view thereof, in a folded position;

FIG. 8 is a side elevational view thereof, in a folded position; and,

FIG. 9 is a bottom plan view thereof, in a folded position.

The evenly spaced dash-dot broken lines on the side rails and steps shown in FIGS. 1-3 and 6-9 represent contours and are part of the claimed design.

The broken lines shown in the figures are included for the purpose of illustrating portions of the folding stairs and form no part of the claimed design.

Claims

The ornamental design for folding stairs, as shown and described.

Referenced Cited
U.S. Patent Documents
5505476 April 9, 1996 Maccabee
5941342 August 24, 1999 Lee
D449895 October 30, 2001 Wilson
D698463 January 28, 2014 Porter
8668216 March 11, 2014 Ellement
D742079 October 27, 2015 Jakubowski
20070289556 December 20, 2007 Hoffman
20080157500 July 3, 2008 Raley
20090211845 August 27, 2009 Hoffman
Patent History
Patent number: D819229
Type: Grant
Filed: Mar 16, 2016
Date of Patent: May 29, 2018
Assignee: RADIO SYSTEMS CORPORATION (Knoxville, TN)
Inventors: Patrick Hoffman (Arlington, TX), David King (Allen, TX), Thomas Murphy (Arlington, TX)
Primary Examiner: Cynthia Ramirez
Assistant Examiner: Gino Colan
Application Number: 29/558,345
Classifications
Current U.S. Class: Stepped (12) (D25/63)