It is also locked in disputes over mobile patent infringement with other companies including Samsung Electronics and HTC, in several countries.

Apple is locked in mobile patent infringement battles with a number of companies, including Samsung Electronics Co Ltd and HTC Corp, in several countries.

Apple is locked in mobile patent infringement battles with a number of companies, including Samsung Electronics Co Ltd and HTC Corp, in many countries.

Samsung, Asia's most valuable technology company with around $137 billion in market value, is in a separate legal battle with Apple over mobile patent infringements.

Samsung rejects the claims and argues the U.S. firm infringed on its mobile patents.

The market for high quality mobile patents, such as Nokia's, could be quite strong judging by past deals.

Under this deal the search giant will keep the majority of Motorola's mobile patents, considered its prize assets.

Google agreed last week to buy Motorola Mobility for $12.5 billion, largely for its vast portfolio of mobile patents.

Google has struck the biggest deal so far, announcing plans last year to buy Motorola Mobility for $12.5bn, largely for its portfolio of mobile patents.