A Texas-based company called TechRadium filed suit against Twitter Tuesday, August 4, 2009, in the Southern District of Texas, alleging patent infringement.  TechRadium is a technology company that makes mass notification systems which provide a platform where one message can be sent to multiple recipients over various types of devices.

The complaint alleges that Twitter infringes on three TechRadium patents: 7,130,389 (issued October 31, 2006), 7,496,183 (issued February 4, 2009), and 7,519,165 (issued April 14, 2009).  TechRadium is not just looking for a payout here, but has requested punitive damages and a permanent injunction.  Effectively, TechRadium wants to shut Twitter down and clean them out.

This lawsuit probably does not come as a surprise to Twitter.  Actually, in some ways it was expected by the company, although the plaintiff may have been the unknown variable.  Mistakenly leaked internal Twitter documents from a February 2009 strategy meeting were posted last month by TechCrunch.com, in which the expectation of legal action were discussed.  Specifically, the documents reveal that Twitter expected to be “sued for patent infringement, repeatedly and often.”  The same memo queried “should we get a great patent attorney to proactively go after these patents?”  I hope they followed up on that question!

This will be one to watch . . . and tweet about while we can.

August 18, 2009 - Update: Free outside counsel scouring TechRadium patents to aid Twitter in legal battle, read more here.