Hhg IncSuspension system for a wheelchairWO2000012040A1Aug 25, 1999Mar 9, 2000Alu Rehab A SWheelchair provided with jacking apparatus and anti-tip deviceWO2000054718A1Mar 16, 2000Sep 21, 2000Permobil AbAn anti-tip device for a wheelchairWO2000066060A1Apr 28, 2000Nov 9, 2000Tartan Rehab LtdAnti-tip devices for wheeled conveyances including wheelchairs and methods related theretoWO2003030800A1Sep 20