Amazon patents granted on 30 April 2013

5 US patents granted on 30 April 2013 and assigned to Amazon

1 8,433,771 Distribution network with forward resource propagation
2 8,433,626 Method, medium, and system for flipping a list
3 8,433,625 Geographical preferences
4 8,433,437 Method and apparatus for sensing correct item placement for multi-destination picking
5 8,432,356 Button with edge mounted pivot point