RIM faces yet another patent suit

US wireless e-mail software provider Visto is suing Research in Motion (RIM), the maker of BlackBerry mobile devices, over several patent claims, an Associated Press report said.

The report said the case was the latest twist in the tangle of legal battles over wireless e-mail, the most highly publicized of which ended in March with RIM agreeing to pay NTP $612.5 million to settle a four-year dispute.

Visto, a privately held company, provides e-mail software to mobile phone companies, including US carriers Sprint Nextel and Europe's Vodafone Group.

In its newest lawsuit, Visto sought unspecified damages and a halt to RIM's alleged infringement of four patents related to technology that allowed mobile access to data, the report said.