San Jose - Samsung attorneys say patents that Apple claims in a lawsuit were infringed are part of the Android software package developed by Google engineers.
Samsung attorney Peter Quinn told jurors in his opening statement on Tuesday that Apple is a great company but doesn't own everything and its claims are unfounded.
The finger-pointing occurred in US District Court in San Jose, where, Apple and Samsung are accusing each other of stealing ideas.
Apple lawyer Harold McElhinny says evidence in this case will show that Samsung copied the iPhone.
If Apple prevails in the current case, the cost to Samsung could reach $2bn. Apple's costs, if it loses the litigation, were expected to be about $6m.
The two companies have battled in litigation around the world.