Apple patents granted on 21 March 2006

4 US patents granted on 21 March 2006 and assigned to Apple

1 7,016,944 System and method for passive detection and context sensitive notification of upgrade availability for computer information
2 7,016,891 System and method for performing context checks
3 7,015,921 Method and apparatus for memory access
4 7,015,919 Virtualization of graphics resources