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| Number | Title | Issue Date |
| 8006728 | Centrifugal wheel A centrifugal wheel apparatus for a vehicle having a plurality of pivoting elements attachable to an interior of a vehicle wheel that, when subjected to centripetal force, pivot away from the vehicle wheel and toward a pneumatic tire attached to the vehicle wheel to... | 08/30/2011 |
| 7249757 | Brush type small motor having non-linear spring device A spring device consists of a coil spring case formed of right, left, back and front side plates and a spring receiving plate, a coil spring having a liner spring property, and a spring urging member for urging the coil spring into the coil spring case. A distance b... | 07/31/2007 |
| 6964309 | Vehicle with compliant drive train A vehicle that is propelled by as few as one actuator through a compliant drive train can move quickly on relatively smooth terrain and can climb obstacles. The body of the vehicle may consist of a single segment or multiple segments connected by articulating joints... | 11/15/2005 |
| 6698480 | Non-pneumatic tire and wheel system A non-pneumatic tire and wheel system comprises a tire having an exterior tread surface with a tread pattern and an interior surface. A wheel has a hub and a rim assembly. A plurality of radially oriented shock absorbing spokes each have radially interior... | 03/02/2004 |
