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Patent
   D540503
Priority
Dec 16 2005
Filed
Dec 16 2005
Issued
Apr 10 2007
Expiry
Apr 10 2021
Inventors
Tsang, Wai…
Assg.orig
Ultrabrigh…
Assg.curr
Ultrabrigh…
Entity
unknown
Referenced by
18
References
16
Maint.:
n/a
The ornamental design for stair climbing wheel system, as shown and described.

FIG. 1 is a perspective view of a stair climbing wheel system showing our new design;

FIG. 2 is a top view of the stair climbing wheel system, the bottom view, front side view, and rear view being identical to the top view, and thus are not shown; and,

FIG. 3 is a right side view of the stair climbing wheel system; the left side view being identical to the right side view and thus is not shown.
INVENTORS:

Tsang, Wai Kay

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
10046819, Jun 23 2014 RECONROBOTICS, INC Throwable robot with clamshell body
10526029, Aug 15 2017 RECONROBOTICS, INC Two wheeled robot with convertibility and accessories
10589430, Aug 15 2017 RECONROBTICS, INC Throwable robot with improved drive system
10683045, Jun 23 2014 ReconRobotics, Inc. Throwable robot with clamshell body
10688671, Dec 09 2008 ReconRobotics, Inc. Two wheeled robot with enhanced climbing features
10987818, Aug 15 2017 RECONROBOTICS, INC Magnetic lock for throwable robot
11312031, Dec 09 2008 ReconRobotics, Inc. Two wheeled robot with enhanced climbing features
11479102, Aug 15 2017 ReconRobotics, Inc. Two wheel robot with convertibility and accessories
11504859, Aug 15 2017 ReconRobotics, Inc. Throw able robot with improved drive system
11673464, Jun 23 2014 ReconRobotics, Inc. Throw able robot with clamshell body
11772936, Feb 22 2022 Portable transport apparatus
7503567, Apr 16 2007 Automated wheelchair
9308968, Dec 26 2013 Daegu Gyeongbuk Institute of Science and Technology Leg type traveling apparatus
D626577, Dec 09 2009 RECONROBOTICS, INC Two wheeled robot with enhanced climbing features
D637217, Dec 09 2009 ReconRobotics, Inc. Two wheeled robot with enhanced climbing features
D814738, Jul 14 2016 Hand truck attachment
D819919, Jul 14 2016 Hand truck attachment
D821054, Oct 05 2016 Hand truck attachment
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2400824,
2706640,
3920255,
4061199, Dec 03 1974 Karl-Heinz Werner, Toosbuy Chassis for a vehicle capable of travelling over obstructions
4264082, Mar 26 1979 Stair climbing cart
4687213, Sep 25 1984 Wheel assembly for traversing obstacles
4919489, Apr 20 1988 Grumman Aerospace Corporation Cog-augmented wheel for obstacle negotiation
5273296, Nov 07 1991 Obstacle overcoming vehicle suspension system
6029982, Oct 11 1996 Exedy Corporation Wheeled vehicle for movement on escalators
6644675, Jul 31 1998 Ferno-Washington, Inc. Stair chair
6926287, Sep 15 2003 Stroller assembly
D299953, Feb 27 1986 MCNEILAB, INC Control panel for a patient photophoresis treatment unit
D318358, Aug 16 1988 Sortex Limited Carriage for a conveying system
D340340, Oct 18 1991 Allen Engineering Corporation Riding trowel cranking dolly wheel assembly
D340341, Sep 17 1991 Creative Storage Systems, Inc. Pallet brake track assembly
D413420, Aug 31 1998 Rolcon, Inc. Conveyor roller bearing support assembly
ASSIGNMENT RECORDS    Assignment records on the USPTO
//
Executed onAssignorAssigneeConveyanceFrameReelDoc
Dec 16 2005Ultrabright Limited(assignment on the face of the patent)
Jul 04 2006TSANG, WAI KAYUltrabright LimitedASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0180890281 pdf
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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