Folding stairs
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The evenly spaced dash-dot broken lines on the side rails and steps shown in
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.
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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