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| US5280935 | 1 Jun 1993 | 25 Ene 1994 | | Self-propelled skateboard | | US5895065 | 29 Feb 1996 | 20 Abr 1999 | | Method and means of enhancing human powered locomotion | | US7040638 | 21 Jun 2004 | 9 May 2006 | | Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle | | US7216876 | 5 Ene 2005 | 15 May 2007 | | Occupant-propelled fluid powered rotary device, truck, wheeled platform, or vehicle | | US7374179 | 21 Dic 2005 | 20 May 2008 | | Truck assembly for a skateboard, wheeled platform, or vehicle | | US7631884 | 15 Jun 2007 | 15 Dic 2009 | Jeffrey E Cole | Truck assembly for a skateboard, wheeled platform, or vehicle | | US7635136 | 14 Mar 2006 | 22 Dic 2009 | Jeffrey E. Cole | Truck assembly for a skateboard, wheeled platform, or vehicle | | US7744100 | 11 Sep 2009 | 29 Jun 2010 | Jeffrey E. Cole | Truck assembly for a skateboard, wheeled platform, or vehicle |
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