According to Interval's lawsuit, Google infringes on Patent by "making, using, selling, distributing, and encouraging customers to use devices containing the Android Operating System and associated software such as Text Messaging, Google Talk, Google Voice, and Calendar."

Patent 6,034,652, dubbed "Attention Manager for Occupying the Peripheral Attention of a Person in the Vicinity of a Display Device," spells out a way to notify users of additional information.

"Devices containing the Android Operating System and associated software infringe by displaying information including, e.g., text messages, Google Voice messages, chat messages, and calendar events, to a user of a mobile device in an unobtrusive manner," claimed the lawsuit.

Interval alleged that AOL's AIM instant messaging client, Apple's Dashboard, Google's Desktop, Yahoo's Messenger also infringed the '652 patent.

Android violates a second patent, , as well, said Interval.