.NET and Win XP Violating Patents?

by Steve Anglin

Related link: http://news.cnet.com/news/0-1005-200-7573185.html?tag=hot

InterTrust Technologies, which makes software that protects songs and videos from being illegally copied, said Thursday that it has added three patents to its lawsuit against Microsoft. The new filing alleges that Microsoft's .NET framework as well as certain Windows XP and Office XP features violated InterTrust technology patents. Microsoft and InterTrust are already involved in a legal dispute over anti-piracy technology.

Does InterTrust have a legitimate claim? Your thoughts.