The broken line showing of the tires and other frame elements is for illustrative purpose only and forms no part of the claimed design.
The ornamental design for wheelchair base, as shown and described.
|D380991||July 15, 1997||Deming|
|6312000||November 6, 2001||Pauls et al.|
|6352273||March 5, 2002||Dickie|
|D491494||June 15, 2004||Lippert|
|7021641||April 4, 2006||Wu|
|D569769||May 27, 2008||Chiu et al.|
|D590304||April 14, 2009||Kruse|
|7828310||November 9, 2010||Vreeswijk et al.|
|D632229||February 8, 2011||Kruse|