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Publication numberUSD287283 S1
Publication typeGrant
Publication dateDec 16, 1986
Filing dateSep 21, 1983
Priority dateSep 21, 1983
Publication numberUS D287283 S1, US D287283S1, US-S1-D287283, USD287283 S1, USD287283S1
InventorsPaul Johnson
Original AssigneePaul Johnson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Portable half-step stairway unit
US D287283 S1
Abstract  available in
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Description  available in
Claims  available in
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7686138 *Apr 19, 2008Mar 30, 2010Schmidt Helene EFree standing step with user customizable height and flat expanding deck
US20060243522 *Feb 14, 2006Nov 2, 2006Hart Kelly FPortable stepping device
US20110232214 *Sep 29, 2011Shi-Tron LinMethod, Component and Structure for Constructing a Dual-Use Staircase
US20130212960 *Feb 21, 2013Aug 22, 2013Kurt FreundModules for converting a stairway
WO2006088927A2 *Feb 14, 2006Aug 24, 2006Barbara FollettePortable stepping device
U.S. ClassificationD25/69, 182/228.1, D25/65
Cooperative ClassificationE04F11/0201