I invented the question mark.

In a potential warning of courtroom drama to come, Creative adds that interfaces covered by the Zen Patent can also be, "found in some competing players, such as the iPod and iPod mini"...Stressing its point, Creative says its invention for the user interface for portable media players enables selection of at least one track in a portable media player as a user "sequentially navigates through a hierarchy using three or more successive screens on the display of the player". One example of this could be the sequence of screens that could display artists, then albums, and then tracks.
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