T1B

So news is spreading that MS is trying to patent the IPv6 autoconfiguration. A patent was submitted a few years back that basically tried to patent the work that was done by the IETF. They submitted the names of several of the MS engineers who worked on the IETF committe that developed IPv6.
Apperently MS has stated they will not use the patent, but several large firms are concerned anyway.

zdnet UK article