A jury has been selected on Monday to decide the merits of Apple Inc's claims that Samsung Electronics' smartphones and computer tablets are illegal knockoffs of the iPhone and iPad.
Lawyers for both sides were expected to deliver their opening arguments on Tuesday morning in a federal courtroom in San Jose, California.
California-based Apple is demanding $2.5b in damages and a ban on the Korean electronic giant's smartphones and tablets in the US. Such a verdict would dwarf the largest patent-related verdict to date.
Al Jazeera's Rob Reynolds reports from Los Angeles.