Yesterday Apple and Samsung presented closing arguments in their patent trial, and jury deliberation is expected to start today.

Presiding Judge Lucy Koh has given the jury a 109-page set of instructions. The jury must decide if, as Apple claims, Samsung illegally “ripped off” the iPhone and iPad, or, as Samsung claims, Apple is merely trying stifle competition.

This is all part of the ongoing, global legal battle. Apple and Samsung have filed more than 30 lawsuits against each other across four continents. For example, Apple alleges that Samsung copied the slide-to-unlock technology of its iPhone and iPad devices.