One of the hottest names in tech, Apple, Inc. (NASDAQ: AAPL), and its wireless partner AT&T, Inc. (NYSE: T), have been sued by Klausner Technologies Inc. for patent violation. Although patent litigation is far and away the joke of the law business these days, this one involves the "Visual Voicemail" feature found on the iPhone, which lets customers visually see their voicemails and go directly to any of them (instead of the standard chronological order most wireless carriers offer).

Kluasner Technologies claims that two of its patents are being violated by Apple and AT&T, and that it is entitled to $360 million in total damages, including future royalties from both companies based on continued usage of the visual voicemail feature by iPhone customers.

From the actions by Klausner Technologies this week, it seems that the company is a patent litigation hound more than anything. The company also filed suits against eBay Inc. (NASDAQ: EBAY)'s Skype unit, Comcast Corp. (NYSE: CMCSA) and more for violation of Klausner's VoIP (Voice over Internet Protocol) patents. It wants an additional $300 million in those lawsuits. Klausner settled with more companies last year over its VoIP patents and this year it looks to be continuing the trend.