"This is a tactical and procedural post-trial action to ensure and protect our property rights as we proceed to final resolution with Microsoft," says VirnetX CEO Kendall Larsen.
Microsoft has already vowed to appeal the first ruling, and challenged this latest suit as well. Says MSFT spokesperson Kevin Kutz (via AllThingsD): "Microsoft respects intellectual property, and we believe our products do not infringe the patents involved. Moreover, we believe those patents are invalid. We will challenge VirnetX?s claims."
The company has already asked the U.S. Patent and Trademark Office to re-examine the patents, and a preliminary review has already deemed most of VirnetX's claims as "invalid."