Summary Box: Chinese company sues Apple in US

BATTLE EXPANDS: Apple Inc. is facing yet another challenge to its use of the iPad trademark in China ? this time in a court in California.

WHAT HAPPENED: Proview Electronics Co., a unit of a Chinese company that claims it owns the iPad name, filed a lawsuit against Apple’s use of the trademark in mainland China. The case was filed at the Santa Clara Superior Court on Feb. 17.

ABOUT THE DISPUTE: The companies are feuding over whether Proview sold the mainland Chinese rights to the iPad trademark to Apple in a 2009 deal.