SAN FRANCISCO: Google on Wednesday confirmed that it has added more IBM patents to its technology arsenal as smartphone rivals increasingly battle in courts over innovations.

Google bought 188 patents and 29 patent applications related to mobile phones from IBM but did not disclose how much it paid.

Last year, IBM sold Google 2,000 or so patents ranging from mobile software to computer hardware and processors.

Google has been strengthening its patent portfolio as the fight for dominance in the booming smartphone market increasingly involves lawsuits claiming infringement of patented technology.

The California Internet powerhouse behind Android mobile device software last year transferred a set of patents to smartphone titan HTC Corp. to help the Taiwan-based company in an intellectual property clash with iPhone maker Apple.